2006/07/04:
when in the minibuffer, certain key sequences don't seem to get picked up.

2006/07/04:
undo/redo should probably show you what is being undone (i.e. by jumping to that
region of code).

2006/07/04:
undo/redo is mostly fixed, but there are still occasionally problems, which seem
to relate to pasting in multiple lines and cursor positioning.

2006/06/25:
long prompts will cause problems (particularly filenames)