I have installed AVA 49.2 latest build (129) on two different Xbox machines (v1.0 & whatever version a 5101 is

). Everything seems fine, but after leaving one of the machines on over night, I found that it was locked up. The odd part was that the screen was entirely black with the exception of the logo that comes on during the screen saver (where as normally I would still see the background of the "desktop", though it would normally be dim). I then disabled the RSS option and switched the BIOS from metooM8 to X2 4983 BFM and left it on over night again. This morning, it was locked up again. The screen was all black with the exception of the screen saver logo and this time I could see a dim image of the XBMC rotating icon (it wasn't rotating then).
The 5101 Xbox was left on all night for the first time since putting AVA on it and it too was frozen with a black background and the screen saver logo showing.
I have disabled the screen saver on both machines and am leaving them on all day today to see if they lock.
I know that the v1.0 box has never locked up in the couple years that I have owned it (using evox) and it has been left on for days, so I don't think there is any hardware problems (especially since this is happening the same way on another box).
Both machines are using softmod (UXE with metooM8 PBL).
I'm new to Avalaunch (like it a lot) and have read through this message board, but didn't see any solutions that have helped. Any help to resolve this would be great! I really don't want to go back to Evox if possible (not that there is anything wrong with Evox!

)