I'm using the latest T3CH release (10-03-2006) the only thing I added to it is: LiveMark beta 0.733 SuperMod - Full. (I'm not sure if this will be a valid bug entry because of this, if it's not my appologies)
I went into options and I activated the Temperature to be displayed on the top of the blades. XBMC froze.
I rebooted, but nothing was loading up, by chance I have a FTP server on my modchip, so I logged in the ftp of my modchip to find that All these folders (and 1 file) had disappeared:
I reproduced the bug 2 times, always after activating the temperature on the top of the blades.