There's a bunch of weird question marks in your sidebar, around the feed/comments links.
The ?'s are in the source too:
<a href="http://feeds.feedburner.com/MachinesThatGoBing" title="Subscribe to my feed" rel="alternate" type="application/rss+xml"><img id="rssimage" src="/wpadditionalfiles/rssdice.jpg" alt="RSS logo on orange dice" />
<img src="/wpadditionalfiles/feed.gif" class="rsstitles" alt="feed" />
</a>
<a href="http://feeds.feedburner.com/MachinesThatGoBingComments" title="Subscribe to my comments" rel="alternate" type="application/rss+xml"><img src="/wpadditionalfiles/comments.gif" class="rsstitles" alt="comments" /></a>
If you're going to have a picture like that in every blog entry, I'd go from 7 posts down to 5 or even 4. Too many big pictures on the front page.
The older posts navigation seems to be broken, I get "Page 1 of 0" on the bottom.
Add Page navigation to the top of the page somewhere too. Maybe that double bar with the search box in the middle... Older and newer posts links on either side of that would make some sense.
Also, javascript to load a flash object to show a non-moving image? On every post? Are you freakin' kidding me? Okay, yeah, it's small and it caches, but really, it seems like major overkill. You'd be better off manually making the images using a decent image editor and a macro to do the heavy lifting. Key to a good site: Keep it lightweight. It's easy to go overboard with fancy stuff, but it's the words and the content that draws people in. The fancy stuff just causes problems.