I first upgraded on my test machine and it caused hangs there. That's when I tried all sorts of different settings to see if I could sort the problem out, but I couldn't find anything.
I hoped the problem was just isolated to the test machine and upgraded on the HTPC, but the problem also manifested there as well.
scottw, in my earlier post I described how I experience the hang if it reaches the end of the movie AND when I end the program.
Colby, I currently have zoom to end at the end of playback. I've also got an end instruction set up in filetypes. Finally I have XLobby events set up that allow me to stop and exit zoom.
It's possible that zoom's end instruction might be conflicting with XLobby's filetypes end instruction but it was working fine like that with zoom 4.51, and it doesn't explain the hang using XLobby's end event (used when I want to stop playing the file before it ends).
Also, FWIW, if I choose to end the file early, when zoom exits instead of seeing the XLobby interface, I'm left with a still image of the file I had playing when I chose to end it.
I guess I'm just going to have to look harder.