512 Board Issues XBMC

[Bariel]

I'm having exactly the same issue on a 512mb model B board, no problems at all running Raspbian with either mouse or keyboards but within xbian 1.0 alpha 4 the keyboard and mouse work fine for a while when I boot up xbian but then after 10-30 seconds or so of use they stop functioning.

I've tried a couple of different keyboards and mice but without any luck, it works perfectly however with TV or iOS remote or the web based control from separate pc.

I'll have a try of some of the suggestions that flangefrog posted a link to but any other suggestions are appreciated.