[Pharo-users] Weird issues while editing

Hey, all.. I have been having a weird problem for awhile. It has been happening on both pharo 3 and pharo 4. I can't pin down when it is happening, but here's what i am seeing: at some random time, when i hit the backspace, the cursor moves to the beginning of the method name.. and if i type anything, it overwrites the method name and any other text.. if i try to backspace, the cursor goes all the way back to the beginning of the method name. the only way out is to save or cancel changes, and try editing again.. any ideas? thanks!