You are absolutely correct James that disabling Aero Peek is not a fix. Disabling a broken feature is not the same as fixing it.
The lack of a response from Microsoft is disappointing. It is quite clear that this is a bug in the Alt+Tab implementation. It can be triggered by various programs, including the driver program for Microsoft's own Intellimouse. I know that sidebar.exe (also
written by Microsoft can trigger it).
I wrote about my investigation of this bug a year and a half ago. At that time it had been a constant nuisance for most of a year. After the investigation I killed ipoint.exe and sidebar.exe and made sure they didn't come back. That has solved the problem
for me -- I've seen it only once in the last year and a half.
Does anybody know if this bug has been fixed in Windows 8?
What to do? I'm not sure. Call Microsoft maybe? Open official support incidents? Busy Intellimouse mice and then return them as defective?
Here's where I wrote about my investigation.
http://randomascii.wordpress.com/2011/10/16/alttab-depth-inversion-bug/
Again, to be completely clear, this is a bug in the Alt+tab implementation. Thus, it is a bug in Windows explorer.