We have also tried the CuteEditor_OnChange function, which also doesn't pick up the undo/redo clicks in firefox or chrome.
And we also tried the CuteEditor_OnCommand function and it picks up the Undo/redo clicks but is a 'pre-process' action so it doesn't reflect the contents of the editor after the undo or redo action has occurred.
Remember, this works for us in IE, just not Firefox or Chrome.
Any help at all to pick up the Cute Editor button clicks after the action has taken place would be greatly appreciated.