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petopeto said:
I'm running XP64, which means they get to use the excuse that XP64 doesn't support OpenGL (which is a bald lie; it does). They just don't want to bother testing in it. It's absurd, since XP64 is the only 64-bit Windows that isn't Vista, and Vista isn't a choice.
Yeah this is one thing that unfortunately won't change. Windows XP x64 is not a supported platform in their mind. They want people to use Vista x64 or Win7 x64 instead which they have said are a huge improvement since they virtualize the GPU or some such and makes coding much easier/cleaner.

CS4 will use OpenGL in XP x64 if you use the AllowOldGPUs registry edit: http://www.adobe.com/support/downloads/detail.jsp?ftpID=4056

[HKEY_CURRENT_USER\Software\Adobe\Photoshop\11.0]
"AllowOldGPUS"=dword:00000001