I have the WP 2.5.1 fresh install and today installed your plugin. Everything went fine til swithing into administrator again. For instance, I sected let's name it Category-1 to level 10 minimum (which is me). Now when switching to a author level, that category does not appear anymore in my posts category selection, and I suppose it's ok til here. But if i switch back to administrator (level 10), neither I can see anymore that category when i try to move that post to that category back!
Did I miss anything?