Samsung :: Messager II R560 - Keypad Has Become Iffy When I Press Certain Keys

Has anyone else had any problems with the Messager II / R560 as far as the keypad is concerned? My keypad has become iffy when I press certain keys. It happens mostly with the "T" key. Sometimes I'll press it and it won't register. Sometimes I'll press it and it won't register but then double the "T" the next time I hit it. It'll do this on some other keys around the "T" but mostly the T. I'm thinking it's a warranty issue. This started about a 1.5 months in to using it. I just wanted to get a feel for anyone else having this problem. I'm on Cricket...but I assume this is a problem with the MetroPCS version, too.