[Plugin: TinyMCE Advanced] IE7 freezes when this HTML is loaded

Using WordPress 2.5.1 and TinyMCE Advanced 3.0.1… Internet Explorer 7 freezes up while loading TinyMCE Advanced to parse the following HTML code:
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<strong>Shopping online with Montana Fish, Wildlife and Parks is convenient, easy, and secure!</strong>

Simply scroll down the page and add a desired quantity for each item. When finished, click the 'Proceed to Secure Checkout' at the bottom of the page - Your order will be securely processed in a new window.

<span style="color: #7d250d;">At this time, we only accept Visa &amp; MasterCard for online orders</span> - If you would prefer to place your order by phone, we welcome you to call us at (406) 444-6759.

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<div class="MFWP_shoppingItem">
<h2>Old Man of the Hills</h2>
<h4>19" x 32" MFWP Foundation Series print by Larry Zabel - 500 S/N Prints</h4>
<img title="Old Man Of The Hills by Larry Zabel" src="/wp-content/uploads/2008/06/larryzabel-foundationseries_oldmanofthehillspainting.jpg" alt="Old Man Of The Hills by Larry Zabel" />
<ul>
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<h3>Price</h3>
$220.00 ea. (Includes Shipping/Handling)

<input name="ItemCost" type="hidden" value="220" /></li>
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<h3>Quantity</h3>
<input maxlength="2" name="ItemQty" size="2" type="text" /><label>Add desired quantity, and click 'Secure Checkout' at the bottom of the page when done.</label></li>
</ul>
<div class="MFWP_shoppingItemDescription">

For as long as folktales are remembered, as long as legends survive, travelers will know the landmark ridge along Montana's Rocky Mountain Front as "Old Man of the Hills." Here the grizzly transitions between the rugged dark-timbers of wilderness and the ranchland beginnings of the Great Plains. It is a place so rich in plant and animal diversity that it is often called "North America's Serengeti." A landscape where change comes only from the elements-wind, rain, fire, and ice. A Montana gem that remains uncut because ranches, public- and private-land managers, and conservation groups stepped forward with a reason. Larry Zabel, internationally renowned artist and Montana Fish, Wildlife and Parks Foundation board member, visited the Boone and Crockett Theodore Roosevelt Memorial Ranch on Montana's Rocky Mountain Front. Here, he captures the experience of inhabiting the heart of what is good and right with this wild country in his spectacular 30" x 51" masterpiece "Old Man of the Hills." The original artwork and limited edition prints present the first piece of the "Foundation Series." A collection created to put dollars on the ground for the hills will survive to walk by the shoulder of the grizzly. Funds generated from this magnificent painting will help protect and enhance the "Magic that is Montana."

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<div class="MFWP_shoppingItem">
<h2>Montana High Life</h2>
<h4>11 3/4" x 14 1/2" MFWP Foundation Series print by Larry Zabel - Unsigned open-series print</h4>
<img class="alignnone size-full wp-image-89" title="larryzabel-foundationseries_montanahighlife" src="/wp-content/uploads/2008/06/larryzabel-foundationseries_montanahighlife.jpg" alt="Larry Zabel\'s Montana High Life painting is available as a print in the Montana Fish Wildlife and Parks Foundation Series" width="258" height="327" />
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<h3>Price</h3>
$99.95 ea. (Includes Shipping/Handling)

<input name="ItemCost" type="hidden" value="99.95" /></li>
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<h3>Quantity</h3>
<input maxlength="2" name="ItemQty" size="2" type="text" /><label>Add desired quantity, and click 'Secure Checkout' at the bottom of the page when done.</label></li>
</ul>
<div class="MFWP_shoppingItemDescription">

In the “Big Sky Country”, natural history, cultural history, and outdoor recreation play a big part in our lives. From the rolling plains to the jagged peaks, Montana’s assorted landscapes hold a diverse collection of Western lifescapes. Beginning with our dinosaur discoveries and Native American sites, to the camps of the Corp of Discovery and the ghost towns of the gold strike days, Montana compels all of us to become an adventurer.
This fine open series lithograph was made from the original oil painting. It is printed on fine art paper of heavy stock, 100% acid free.
<p style="font: bold italic 18px Arial, Helvetica, sans-serif !important; text-align: center;">A Great Print By An American Icon</p>
Said to be today's Charlie Russell, Larry Zabel's work has won him many awards over the years including "best" at the Charlie Russell auction show and artist of the year southern Maryland Wildlife Festival.

Mr. Zabel was chosen as a panelist for the National Endowment for the Arts and has shown his works in such prestigious places as the White House, the Smithsonian, and the Pentagon.

</div>
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<div class="MFWP_shoppingItem">
<h2>Neighborhood Watch</h2>
<h4>15 7/8" x 32" MFWP Foundation Series print by Larry Zabel - 500 S/N Prints</h4>
<a href="/wp-content/uploads/2008/06/larryzabel-foundationseries_neighborhoodwatch.jpg"><img class="alignnone size-full wp-image-88" title="larryzabel-foundationseries_neighborhoodwatch" src="/wp-content/uploads/2008/06/larryzabel-foundationseries_neighborhoodwatch.jpg" alt="Prints of Larry Zabel\'s \" width="408" height="206" /></a>
<ul>
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<h3>Price</h3>
$220.00 ea. (Includes Shipping/Handling)

<input name="ItemCost" type="hidden" value="220" /></li>
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<h3>Quantity</h3>
<input maxlength="2" name="ItemQty" size="2" type="text" /><label>Add desired quantity, and click 'Secure Checkout' at the bottom of the page when done.</label></li>
</ul>
<div class="MFWP_shoppingItemDescription">

Although the elk catch his eye, the homesteader methodically continues his work. Winter is closing in and there’s a barn to raise. It will take time before he comes to measure his wealth by the richness of the Montana landscape. The herd bull, too, is momentarily distracted, checking the smell of the draft horse and watching the movement of the homesteader. He hears the challenging bugle of a distant bull and dutifully returns to his harem. Then, near the turn of the century, the pioneer stopped working for a moment to take in the landscape, and there was a ghostly stillness. Somehow, during his watch, the elk vanished. With a vengeance he banded together with miners and merchants to bring back the animals and vowed to never let them disappear again. Montana is a vast landscape of differing traditions that mix to form a uniquely Western way of life. Montana is also a small neighborhood formed from closely tied values of community and wildness. A very special place that cannot survive without neighbors keeping an eye out for each other.
<p style="font-style: bold !important; text-align: center;">100 S/N Giclees are available <a href="?page_id=10">via email through the Foundation Office</a> or by calling (406)444-3766</p>

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<div class="MFWP_shoppingItem">
<h2>Look, But Don't Touch</h2>
<h4>19" x 26" MFWP Foundation Series print by Jessica Zemsky</h4>
<a href="/wp-content/uploads/2008/06/jessicazemsky-foundationseries_lookbutdonttouchpainting.jpg"><img class="alignnone size-full wp-image-87" title="jessicazemsky-foundationseries_lookbutdonttouchpainting" src="/wp-content/uploads/2008/06/jessicazemsky-foundationseries_lookbutdonttouchpainting.jpg" alt="Jessica Zemsky\'s \" width="360" height="271" /></a>
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<h3>Price</h3>
$125.00 ea. (Includes Shipping/Handling)

<input name="ItemCost" type="hidden" value="125" /></li>
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<h3>Quantity</h3>
<input maxlength="2" name="ItemQty" size="2" type="text" /><label>Add desired quantity, and click 'Secure Checkout' at the bottom of the page when done.</label></li>
</ul>
<div class="MFWP_shoppingItemDescription">

Jessica Zemsky created this beautiful painting entitled “Look, But Don’t Touch” for the enjoyment of all. She said “I loved making this painting. It’s about so many things I really care about.” Jessica’s love of life and children shines through this touching work of art.

The Montana Fish, Wildlife &amp; Parks Foundation is proud to be a major supporter of the rehabilitation facility at the Montana Wildlife Complex. This facility and its staff provide exceptional care for orphaned and injured animals, while delivering the important message “Let wild animals be wild”.

We are asking you to give your heartfelt commitment and be our partner to complete the Montana Wildlife Complex - help us build a future for all of Nature’s children.
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<div class="MFWP_shoppingItem">
<h2>Back from the Brink: Montana's Wildlife Legacy DVD</h2>
<h4>Produced by Terry N. Lonner, Narrated by Joseph Campanella</h4>
<img class="alignnone size-full wp-image-93" title="montanadvd_backfromthebring_montanaswildlifelegacy" src="/wp-content/uploads/2008/06/montanadvd_backfromthebring_montanaswildlifelegacy.gif" alt="Back From The Brink - Montanas Wildlife Legacy DVD" width="304" height="263" />
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<h3>Price</h3>
$25.00 ea.

<input name="ItemCost" type="hidden" value="25" /></li>
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<h3>Quantity</h3>
<input maxlength="2" name="ItemQty" size="2" type="text" /><label>Add desired quantity, and click 'Secure Checkout' at the bottom of the page when done.</label></li>
</ul>
<div class="MFWP_shoppingItemDescription">

Back From The Brink: A Montana's Wildlife Legacy is a two-part documentary focusing upon Montana wildlife's rich history of exploitation &amp; depletion brought on by greed, and the renewal and restoration of Montana's wildlife resource, all told through historical imagery and the experiences of old timers, citizens, sportsmen, historians, and wildlife experts.

Part One chronicles the depletion of Montana's wildlife during the 1800s, the beginning of the wildlife conservation movement, while Part Two documents the renewal and regeneration that was the cooperative result of Montana's citizens, elected officials, and universities.
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<div class="MFWP_shoppingItem">
<h2>The Magic That Is Montana Cookbook</h2>
<h4>A Compilation of Tasty Montana Recipes by Montana Fish, Wildlife &amp; Parks</h4>
<img class="alignnone size-full wp-image-91" title="montanacookbook_themagicthatismontana" src="/wp-content/uploads/2008/06/montanacookbook_themagicthatismontana.jpg" alt="The Magic That Is Montana Cookbook" width="403" height="269" />
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<h3>Price</h3>
$12.95 ea. (Includes Shipping/Handling)

<input name="ItemCost" type="hidden" value="12.95" /></li>
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<h3>Quantity</h3>
<input maxlength="2" name="ItemQty" size="2" type="text" /><label>Add desired quantity, and click 'Secure Checkout' at the bottom of the page when done.</label></li>
</ul>
<div class="MFWP_shoppingItemDescription">

The "Magic that is Montana Cookbook" features recipes from Montana Fish, Wildlife &amp; Parks employees and friends.  The collection is compiled of tasty treats and great eats from favorite family recipes - Pheasant Pierre to fudge truffle cheesecake. Mmm! We hope that our favorite recipes will become your favorites too.
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<input name="ItemDesc" type="hidden" value="The Magic That Is Montana Cookbook" />
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<div class="MFWP_shoppingItem">
<h2>Montana State Parks Collector's Edition License Plates</h2>
<h4>Collector's Item Plates • Novelty Only - <strong style="color: #ff0000 !important;">NOT for Vehicular Use</strong></h4>
<img class="alignnone size-full wp-image-63" title="MFWP License Plate" src="/wp-content/uploads/2008/06/mfwp_montanalicenseplate.jpg" alt="Support Montana Fish Wildlife and Parks by purchasing their official license plate!" width="390" height="187" />
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<h3>Price</h3>
$25.00 ea. with <strong>FREE SHIPPING</strong>

<input name="ItemCost" type="hidden" value="25" /></li>
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<h3>Quantity</h3>
<input maxlength="2" name="ItemQty" size="2" type="text" /><label>Add desired quantity, and click 'Secure Checkout' at the bottom of the page when done.</label></li>
</ul>
<div class="MFWP_shoppingItemDescription">

Support Montana's State Parks with your purchase of these limited collector's edition license plates, showcasing the natural beauty of a Montana sunset beneath the big sky.
<p style="font-style: bold !important; text-align: center;"></p>

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<input name="ItemDesc" type="hidden" value="Collector's Edition Montana License Plate - FREE SHIPPING" />
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<div class="MFWP_shoppingItem">
<h2>Montana State Parks Collector's Edition <em>Custom Personalized</em> License Plates</h2>
<h4>Add a personal message to your Collector's Item Plates! • Novelty Only - <strong style="color: #ff0000 !important;">NOT for Vehicular Use</strong></h4>
<img class="alignnone size-full wp-image-63" title="MFWP License Plate" src="/wp-content/uploads/2008/06/mfwp_montanalicenseplate.jpg" alt="Support Montana Fish Wildlife and Parks by purchasing their official license plate!" width="390" height="187" />
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<h3>Price</h3>
$30.00 ea. with <strong>FREE SHIPPING</strong>

<input name="ItemCost" type="hidden" value="30" /></li>
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<h3>Quantity</h3>
<input maxlength="2" name="ItemQty" size="2" type="text" /><label>Add desired quantity, and click 'Secure Checkout' at the bottom of the page when done.</label></li>
</ul>
<div class="MFWP_shoppingItemDescription"><input maxlength="9" name="userMFWP_Collectors_Plate_Custom_Message" size="14" type="text" value=" • " /> <label style="margin-bottom: 1em !important;">Use the box above to enter your personalized plate code - Your code may be up to 8 letters/numbers long, with an optional dot or space.</label>

Add a custom code to your plate for only $5.00 more, and really show off your support for Montana's beautiful State Parks with a personalized message poised above the natural splendor of Montana's sunset emanating forth from the Big Sky horizon.

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<input name="ItemDesc" type="hidden" value="Custom Collector's Edition Montana Plate - FREE SHIPPING: userMFWP_Collectors_Plate_Custom_Message" />
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<div id="MFWP_shoppingPurchaseBox">
<h2>Continue to Checkout</h2>
Once you have entered the desired quantities for item(s) above and are ready to check out, please  click the 'Proceed to Secure Checkout' button below - Your order will be securely processed in a new window. To ensure order accuracy, please check the quantities in the left-hand column of the new window. Montana Fish, Wildlife and Parks <a href="?page_id=10">welcomes your questions &amp; feedback online</a> or by phone at (406) 444-6759.<a title="Purchase your items now" name="PageBottom"></a>

<input type="submit" value="Proceed to Secure Checkout" /></div>
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Ordinarily I would simply pass this off as “another stupid IE7-specific bug” and tell the user to use Firefox instead – Unfortunately, the client is a state agency whose I.T. Department won’t allow Firefox to be installed on workstations. (Internal bureaucratic nonsense and whatnot… probably a case of ‘common sense’ vs Microsoft’s marketing team.)

I’ve tested this on several computers, as well as disabled every IE7 add-on, and still can’t seem to find a way around this.

Any ideas from the WordPress community as to what element(s) might be causing IE7 to freeze?

All thoughts / comments / suggestions / flames / etc are genuinely appreciated – Thanks in advance to all who reply!