[AuXBoX]

Im using xbmclive and i notice sometimes the screen will change size, usually if i leave it on for a few hours or maybe rarely when i boot up. I use the calibration settings for overscan but the screen will either get smaller or bigger. I've set the xorg.conf up with this

http://forum.xbmc.org/showthread.php?tid=70068

and that setup the correct resolution and frequency but it still does it.
This only happens with hdmi.
Can anyone help