Googled it and everyone seemed to be having a 'white cydia icon problem'... have had this problem since i originally jailbroke my iphone 4 tethered running 5.0.1.
now it is untethered and still no fix.
every app i download from cydia works great.. i have no problems with them. however the icons are white. the cydia icon itself is not white however... OCCASIONALLY when i respring or reboot the icons are normal but this is the exception not the rule.