2.50 messed up my videos - B/W picture
I'm having video problems after installing 2.50 on my PS3. Some videos do no longer show up in full color, but instead in B/W picture. Also, when pressing X on one of these videos, the screen flickers for a moment before playing the video, as sometimes happens when starting a DVD.
My TV is an old-ish 4:3 TV, it's connected with the included AV MULTI-OUT cable. I've tried switching between S-VIDEO and the AV cable settings in the settings menu, but nothing helps. Neither does changing the 50Hz feature, or any other option in the video settings menu.
What's wrong? What can I do? :(
All help appreciated :)