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 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.