Photoshop and nVidia driver conflict: work-arounds from Adobe; Fixed in latest nVidia update?

A reader reports: "There seems to be a problem with Photoshop 6.01 on Dual Processor 533MHz machines. Photoshop 6.01 crashed constantly on two such Macs, but ran rock solid on the other machines -including a 733MHz model."

We asked Adobe for a reply on this matter. Here is their response:

"It's impossible to say for sure without more specific info, but the only Photoshop 6.01 MP issue we know about is a known bug in the nVidia drivers present in all the latest Power Macs that can hang Photoshop during painting operations (on MP machines only). nVidia has a version of the driver that fixes the problem, and we expect Apple and/or nVidia to post the updated driver shortly. [Note: We assume the recently posted Apple GeForce Graphics 2.1.1 is the update in question.]

Work-around until then: if someone is having trouble on MP machines but not UP machines, disable or remove the 'MultiProcessor Support' extension. It's in Plug-Ins:Adobe Photoshop Only:Extensions. Either rename it with a '~' as the first character, or drag it to the desktop (or someplace outside the application folder and its subfolders). That will make Photoshop ignore the other processor and behave just as it would on a single processor machine. Try re-enabling MP support after installing the fixed nVidia drivers."

A second reply from Adobe confirmed the basic issue with nVidia drivers, but suggests another work-around:

Apple and nVidia are aware of it and there are< various fixes that will appear soon. Mac OS 9.2 contains the fix. In the mean time, the short answer is to disable the 'Direct Cursors' Photoshop extension plug-in by prepending a tilde to the name to rename it to '~Direct Cursors.' You won't have full-size brush cursors, but the hang will no longer occur."