Ok, for the specs first
I have a v1.5 with a Xenium ice running 2.2.0
m8 bios
maxtor 80g
samsung 616t
UIX 01.03.05
modded xbe for m8
XBMC cvs build 1-15-05

I have tweeked and added code snippets here and there, however, nothing extensive and with whatever variation of 4th tab ive done this problem persists. If I go from main to say games or settings or anything and then return to the main menu and select XBMC, my box reboots. If I select XBMC right off, it runs it fine. Only a minor annoyance but I figured I would report it and see if anyone else had this or if there were any suggestions on it. My path for execute is F:\\apps\\xbmc\\default.xbe