Has anyone had problems installing an app via their PC? Some apps I've had no problems with, but others (SPB Mobile Shell 2.1 and a beta version of Pocket Tunes) both gave me errors that the certificate was not digtitally signed or something like this. I don't have the exact error in front of me but will post when I get it. When I just transfer over the cab file of SPB Mobile Shell and run it on the 800w, it installs fine...