Did you add the twitter javascript to your header?
<script src="http://platform.twitter.com/anywhere.js?id=<MY API KEY>" type="text/javascript">
</script>
I’m still not sure what was causing the problem but it has stopped now. It was adding this tag – <div id="lipsum"> and then never closing it. So, instead of what I was showing before, with the more tag, it looked like this:
<div id="post">
<div id="lipsum">
<p>CONTENT BEFORE MORE TAG
(more…)</p>
</div>
So it was still missing a div and therefore breaking stuff. I noticed that at some point in my testing it just… stopped. I deleted the posts that still had it and now everything seems to be working. Strange…
I’m going to make this as resolved since it’s not longer a problem of mine but it would be nice to know what was going on and why it suddenly just stopped…
An interesting thing to note is that this doesn’t happen on other 2.5.1 installations of WordPress that I run, but if I move those particular themes over to this new site I’m working on the problem persists.
