I've had this error with the MC notepad for a while now. I'm running v. 3.56, (just upgraded, so I havn't checked if later versions have the same error) on Win 98SE.
At seemingly random intervals, while I'm editing plugins, the notepad refuses to accept any more input. I can delete/cut, but I can't type or paste. When this happens the clipboard also seems to be cleared. Closing the window, and then reopening the plugin fixes it, but usually only for 10 secs or so. This doesn't happen every time, I use it, but I haven't managed to find a pattern yet.
At seemingly random intervals, while I'm editing plugins, the notepad refuses to accept any more input. I can delete/cut, but I can't type or paste. When this happens the clipboard also seems to be cleared. Closing the window, and then reopening the plugin fixes it, but usually only for 10 secs or so. This doesn't happen every time, I use it, but I haven't managed to find a pattern yet.