Mercator,
Can you email us directly at
support@splasm.com with a system profiler report created just after you run into that error? We can't really begin to troubleshoot your specific case until we get more details on what is going on under the hood.
You can send us the report by going to the Apple in the upper left of your screen, and selecting 'About this Mac...'. From there you will see the about window with two buttons on it. Click on the 'More Info...' button at the bottom. This will open the System Profiler application. While running System Profiler, go to the File menu and select 'Save'. This will pop up a window where you can choose where you are going to save your report. Once this is done, you can find your report where you have saved it and drag it to a new email to us.