My apologies again, everyone. I realized that my import of the correctly formatted unicode-compliant XML backup of my blog entries, comments, etc, actually created new page addresses so that all links to my pages were broken. How rude!
So, I’ve reloaded a database copy with the right numbers (fortunately I’ve kept them), and will deal with the unicode mess later, so all the Greek and Hebrew texts are messed up at the moment, temporarily. I noticed that some early posts on the blog are now out of order, too, which is weird, and I can’t tell when that happened, but it must’ve been in one of my earlier moves.