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Just got a new Mac Pro at work and as I can't stand the ZX Spectrum-esque 'dead flies' feel of the new Apple keyboards, I brought my trusty IBM SpaceSaver II to the office (with a USB/PS2 adapter)

All seems generally to work ok - even the Trackpoint 'nipple' but periodically the modifier keys, notably the Ctrl and Windows keys seem to go into 'sticky' mode so that typing an 'S' brings up the save dialog, 'O' = open dialog etc. etc.

Its generally fixed by switching windows and then returning back to the offending one, but this is really beginning to cheese me off. Can anyone suggest a fix?

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You don't have options set under Keyboard in Universal Access in System Preferences? –  Daniel Beck Dec 6 '10 at 11:27
    
@DanielBeck - no. And in fact it gets weirder - I installed bootcamp and Windows 7 and am getting the exact same problem under Windows. However I'm getting neither issue on my own (2007) MacPro running exactly the same OS version and software. –  public static void Dec 6 '10 at 11:35
    
Both machines use the same PS2/USB adapter? What about using a different USB port? –  Daniel Beck Dec 6 '10 at 11:52
    
@DanielBeck - yes, the adaptor is the same make & model. I've tried swapping them between my home & work machines and also moved them around to different ports and tried with and without a hub. I'm wondering if there is different firmware on the 'Pros - they were manufactured maybe 2-3 years apart - do you think this is could be a possibility? –  public static void Dec 7 '10 at 9:03
    
Let's see -- it's not the keyboard, adaptor, port, or operating system... there's not a whole lot else left, besides firmware and internal components. Do you have or can get another PS/2 keyboard (preferably the same model, although they seem to be quite rare) and try that, to see if it's always or just the combination of computer and keyboard? Are you up to date in Apple software update? –  Daniel Beck Dec 7 '10 at 12:04

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