I’m having this problem, too.
Tried what you suggest, again and again. Still doesn’t work.
Also, see my post:
Content disappears when I hit Preview or Publish!
http://wordpress.org/support/topic/306336?replies=2
Or should I say:
http://wordpress.org/support/topic/306336
I tried some of those things: still doesn’t work.
– Don’t have plugins, other than the one that came with WordPress, which I disabled
– It is the latest version
– Theme is what the blog master, or whatever you call him set; looks real vanilla to me
– Don’t understand the part about repairing user permissions.
TempToe