Thanks for the help!

Sorry for the duplicate post.
For some reason the search function in this forum does not return anything when searching for U3...

And see
http://www.mediamonkey.com/forum/viewtopic.php?t=28077

I would think it better to use the U3 uninstall program rather than using the methods given in the link nohitter151 gave above. Using the uninstall program under Settings in the U3 Launchpad is the method recommended by U3 and gets rid of the read-only partition and frees up the space on the flash drive. You do have to back up your data, as I said in that post. I haven't tested without, but I would guess that administrative privileges are not needed for this method. And there will be no problem accessing audio CD's.

I've been having some problems with Mediamonkey (version 3.0.2.1134) on my computer for some time now but managed after some debugging to find the cause.
The system hangs when I start Mediamonkey - Windows Explorer is completely frozen and Mediamonkey does not respond when trying to shut it down (not even when trying to forcefully kill it using the task manager).
After some debugging I found that the cause of the problem was the USB stick I had mounted in my computer.
It seems this is related to the U3 software on the stick.
When the stick is removed, everything unlocks and the system is fine.
I have tried other USB sticks as well and it seems the problem is consistent when using U3 enabled sticks.
For sticks without U3, there is no problem.
U3 automatically mounts a virtual CD drive on the computer and it is when Mediamonkey tries to access this drive that the system hangs.

I am running on Windows XP Professional with SP2.