actually, mikimouse, this was driving me mad, too. somebody just told me how to fix it.
if you post and you get the "internal server" or "page not found" screen do not refresh the page. hit the "back" button, and when the page comes up, go to your post, copy it to the clipboard and then go to your blog (or the article you commented in), and check to see if your post or article has "taken". it should be there.
if for some reason it's not, refresh the page, then repost from the clipboard when it comes back up. i just tried it, and it does work. i hope this might help.
but as for WHY it happens .... um ... help ? lol
mig XX
