I noticed recently that a couple of my applications are uninstalling by themselves, it's happened to me now twice, and I don't know the reason why. Has this ever happened to anybody else, if so how can this be fixed??
Don't install apps on the SD card. They Will disappear. It is a known issue with this phone. If an app installs to SD card, just move it back to phone.
I had the same trouble at first, noticed they were all the ones on the SD card. So I took the time to put them back on the phone and it hasn't happened since.