Hey, quick question to any who has experienced this problem.

I recently bought 8gb authentic sandisk card and loaded them with games, pics and music files.
I have then forced exit on one of the games then voila. Nothing is visible any more even though memory is clearly taken up still.... I reset the darn thing and shut down the thing with no success. In the end, I have just formatted the stick and it seems fine.

Problem is this. I do not want this to happen EVER again.
I never had this issue prior to my recent update to 5.00v4 m3 and before I purchased this stick.
Is this common issue or is this a stand alone case? If anyone has run into this kind of issue before, please share your experience here.