So I run dual Displays on my Windows XP System and since upgrading to iTunes 7.2 (7.2.0.34 is my current version) every time I would switch users or even go into sleep mode with iTunes open, I get a nice little “Unsupported Display” error message and Windows would hang up. This forces me to press my favorite 3 keys Ctrl, Alt and Esc (I get me to where I’m going faster than Ctrl, Alt, Del, plus thats far too cliche by now…but I digress) to end the iTunes task and get running again. Now I should note my secondary monitor is on the left and has a lower resolution and reinstalling in all shapes, forms, etc, did nothing but waste my time.
The iTunes support page was little help and the other solutions I saw were to simply keep iTunes on the monitor with the lower resolution…however, that’s not a great solution in my opinion. The better solution I discovered is to adjust a Quicktime setting.

    Go to Start >Control Panel >Quicktime
    Select the Advanced tab and set the Video option to Safe Mode (GDI Only)

The only downside that I have found is that you can no longer jump into full screen…However, since I am running dual monitors it does not really bother me that much. Hope this helps & please let me know if anyone finds another solution.

Cheers,
aa!2on