Installed it at work and at home today - niccccce! :P
One thing to mention, though: I almost didn't install it, because on the "What's new" page you write that the iCal-Export cannot be imported into Outlook. Which is what I do every morning.
Luckily, I thought "What the heck, give it a try", and installed 2.2.1 on the windows machine at work, started it with a backup of my gtd file, processed a few test events aka scheduled actions and imported the calendar file into Outlook. Works flawlessly so far. (I only import scheduled actions as events, I do not need the other information in Outlook. What for, I have it in Thinking Rock? :) I have not tested if there are problems if I try to import more than this.)
Long story short: I almost did not install your wonderful update because of your warning of a problem that really isn't there. I do not know if you have solved the problem and just have not had time to remove the warning yet. Or maybe the problem is not as bad as you thought. If it helps, I can send you the gtd file.
Best wishes
Kai