I've had this issue since the 2.2 leaks (2.2.9-2.3.15 and now with RubiX) and have finally gotten tired of it. When downloading apps or updates from the market, 1/2 the time it'll finish downloading but then won't install. It just hangs there at 100% and nothing happens no matter how long I leave it there. I have to cancel download and then re-download, sometimes multiple times, before it'll install it automatically. This happens with every app, and while I do eventually get everything install, it will still very annoying. Does anyone else have this issue?