Yep, it's happened with some of mine as well. Someone in another thread mentioned that it might have something to do with the particular timing of those posts. They might have been posted on the 'old' site but weren't there early enough to have made it to the 'new' one, and so were lost in nirvana.

I'm sorry that you lost some longer posts, Gregsta. Let's just hope that with the new, bigger server working now, this won't happen again. It doesn't seem to be an ongoing issue - more one that had to do with unfortunate timing as I understand it.