I've had my Pearl for about a week and experienced some of the usual issues (lost call log and messages). I bought a 4 gb Memory card. Now the issue is when I take a pic I get a message tht says "File system full". What am I doing wrong? Do the pic's automatically go to the memory card? Or do I need to do something to make that happen?

It is not automatic just because you install the card, you must set the preference for the save.

Camera > Options > scroll to bottom and set the SAVE TO the Media Card, and save.

Same with Video recording.