Cseries :: C5-00 5 Mp Video Recording Freeze?

i got my phone about 2 months ago. it worked fine for about a month, and then, just like that, it started to freeze in the middle of the recording for about 2-3 secs, then started rec ok, and agaian freezed for 2-3 secs and so on. After i downloaded the movie and played it, it played the same as the recording(with the freezed sections, but with sound). I checked the sw version(the last one), i changed the card, i formatted it. The problem(for now) is solved by taking down the recording quality, but i dont want this to be a permanent solution.