I see what you're saying now. The only problem I have with your theory (but I'm not saying you're wrong--but this is why you *may* be

) is that I never had this problem before the 2.2 update. The apps haven't changed. Obviously there have been some big changes to the OS, such as the new changes that supposedly make it faster. So it could be that they change the way things are done when exiting apps.
edit: As a test, I just rebooted my phone. The first thing I did was pull the keyboard out and BAM ... no icons. This is very aggravating.
Another thing--do you see this when sliding out the keyboard? All that does it switch the landscape to portrait and vice versa, so that sorta throws a wrench into the system too. Flipping the display should be a relatively painless and quick process--at least it was before 2.2