iphone 5g. iphone 5g releaseCompufixSep 20, 06:09 PMI hoped that this update should have throw away the X1900 XT Bug with my 23" ACD while booting XP ... but no, still here ... grrr :/ I use the 30" ACD with mine and it works well...there IS a driver for the ACD you can install...called winacd located at sourceforge. Google winacd. Not sure if that solves your problem, but I love the control