It's been my experience this is an issue with how NextGen writes the images into the post. Test it out and look for this:
When it writes the NextGen images, it does so with just single quotes.
<a href='http://hoosierhoopsreport.com//wp-content/gallery/carmel-vs-noblesville-11dec02/dsc05405.jpg' title=''><img src='http://hoosierhoopsreport.com//wp-content/gallery/carmel-vs-noblesville-11dec02/thumbs/thumbs_dsc05405.jpg' alt='SONY DSC' class='ngg-singlepic ngg-none' /></a>
vs. using double quotes for an image out of media library or off your hard drive.
<a href="http://hoosierhoopsreport.com/wp-content/uploads/logo.png"><img src="http://hoosierhoopsreport.com/wp-content/uploads/logo.png" alt="" title="logo" width="570" height="200" class="alignnone size-full wp-image-3168" /></a>
I used to be able to find the fix for it, but I can't locate it now. I spent about 15 minutes trying to search for it. It's been that way since I started using the plugin two years ago.