Yesterday, I had a problem with editing posts. I’d click “edit”, then the next page would load blank.
Solution: Disable Clutter Free (by Mark Jaquith), which “is a plugin that lets you hide portions of the WordPress posting interface that you rarely (or never) use. Instead of being minimized (and still taking up room), they’ll be completely invisible.” Mark Jaquith will be gone until May 11th, so until then, I’ll have do without it.
I haven’t changed any core WordPress files, and this was working fine for awhile. Maybe my host updated something that broke this.
Note: For future reference, this post was written in WordPress 2.1.3.