On searching this forum, I haven't seen this bug mentioned anywhere else yet so perhaps it's gone undetected for the last few versions.
In Windows Explorer, or My Computer, the Media Jukebox context menu appears multiple times, once for each time you open the File Menu. For example, open My Computer or Explorer and highlight any file in the right hand pane. Go to the File menu and notice there should be a single entry for Media Jukebox in the first section. Now close the File menu and then open it up again. You'll now see the original Media Jukebox entry, plus another one a little further down (on my systems, it appears all these additional times with the MJ icon preceding it). Do this a few times, highlighting a different file or folder if you like, and you'll see that a new Media Jukebox entry is added to the File menu for every time that you open it.
Highlighting a folder in the left hand pane and opening the File Menu will cause this count to reset (such that the behavior described above will start from one again when a file or folder in the right pane is highlighted). Also note that you won't see this behavior in a right click context menu, only in the File menu available from the top of the Explorer window.
This behavior occurs on 2 different tested systems:
1. Windows XP SP1 with Media Jukebox 8.0.393
2. Windows 2000 SP3 with Media Jukebox 8.0.388
On both systems, I'm using the Media Jukebox shell integration as indicated under Settings -> Options -> General -> Shell Options. Neither system is enabling the Media Scheduler.
Regards,
~Cherie