I've seen some discussion on this but couldn't find a resolution. Is there documentation out there that specifies what undo functionality works and what doesn't and with which browsers?

I've tested it and it is very inconsistent. For instance in a firefox browser I can undo a partial sentence delete by selecting the browser Edit >> Undo. But I cannot undo a full line delete. I also cannot undo the formatting i.e if I bold some text I can't undo that.Scratch that.... undo formatting does work in firefox.. but IE does not have an undo button and ctrl z does not seem to work. Should ctrl z work?

Thanks

Rob Castle