Opened a small video, then touched the "Jog/shuttle" and ended up with that error. No matter, how many times I click OK, error just comes back and I can't get anywhere unless I'm really fast and click the Avidemux close button right after hitting enter on that error. Windows XP and latest r8192 beta.
This bug still also on the latest beta r8235 and btw. same thing at the end of file, only that there it is of course "Cannot go to the next keyframe"