Movie player failure
 

I returned my TH-55 for a replacement after the onboard wireless network feature died. I had a complete backup to my memory stick and so was able to get up and running quickly.

One odd thing: the Movie Player app will no longer play any of my movies. Any attempt to do so merely displays this message:

"Playback failed: Cannot play the selected move. This format might not be supported."

The movie files are fine as far as I can tell (they play perfectly on my Mac).

Any ideas?