Maemo3 =/= Maemo4 =/= Maemo5 If that were the case you could easily take an app from back then and run it now. Maemo 5 and Maemo 6 sharing QT libs will hopefully remedt this problem. Heck even taking Chinook and Diablo apps and trying to run them on the N900 is a game. You have no idea what works or not due to all the changes. Some apps you'll find it installs when you expect they wouldn't and the apps you think would work won't.