Tired of graphical corruption resulting in depth changing to 256 colours.

When will the bug in the Boot Camp WinXP ATI Radeon 2600 HD Pro (mid-2007 24" 2.8GHz iMac that causes graphical corruption resulting in colour depth switching to 256 colours be fixed? This happens after a random time running WinXP (from mere minutes to hours), and can only be fixed by restart.
Years have gone by and Boot Camp updates, reinstalling Windows, a new 24" iMac (same model sigh), and tearing my hair out in frustration as Applecare support and bug reports achieve nothing has left me rather disillusioned. FYI - Apple Boot Camp graphics driver is the only one that works with my model iMac.
Still, it's gone on for so long I'm nearly ready to buy a new iMac. Can anyone tell me if this problem exists in any of the new models? Hopefully not since they use different GPUs, but given Apple's inability to sort even this most basic and glaring of bugs, I thought it wise to ask first.

This appears to have resolved the issue on restarting the system. I guess I must have accidentally moved this slider while looking through the system settings.
It doesn't explain how rotating the display twice "fixes" (or reverts) the changes made. That's a matter for a dev team if they ever want to bother looking into it though.
Many thanks for the help,
Duncan.

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    Any ideas? Thanks in advance.
    Last edited by CHPE (2011-01-02 17:37:11)

    I get same problem with guildwars in fullscreen when entering character select. I have to ctrl-alt-F1 to tty then back to get rid of the garbled graphics. Then my characters vanishes except for their armor/effects. Going into windowed mode stops the garbling of the graphics but the bodyless avatars remain. There is one error stands out in wine output but can't find anything specific to this error that helps.
    fixme:actctx:parse_depend_manifests Could not find dependent assembly L"Microsoft.Windows.Common-Controls" (6.0.0.0)
    Infos
    2.6.36-ARCH X86_64
    ATI Radeon 5870
    catalyst-hook 10.11-1
    catalyst-utils 10.11-1
    lib32-catalyst-utils
    xorg 1.9.2
    wine 1.3.9 (same problem with previous versions of wine)
    Winetricks version 20101106
    Last edited by Snakeye (2010-12-13 03:03:49)

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