Does anybody have an issue while recording RAW video on 50d - video recording stops and says "card file system error"?
I've never had an issue with raw on the 50D - although haven't tried recording for longer than 2 minutes. H.264 has given me some reliability issues though. I also use a CF Sandisk 64GB Extreme Pro 160MB/s
I like filming with the raw crop mode (1x1). However even with the preview option set to "Canon" (i.e. normal liveview x5 zoom framing), the display turns to grayscale as soon as I press record, which isn't bad (it's nicer than the slow framerate preview you get with the "ML Grayscale" setting), but it's a bit hard to use if trying to focus manually during recording. Wondering if anyone has been able to get round this issue? I've tried various nightly builds and all the menu settings I could think of.
Before recording - crop liveview in colour:

During recording - turns to grayscale:

Also I use lenses with image stabilisation. and as far as I know on the 50D the only way to activate IS whilst recording video is to keep the shutter half pressed continuously whilst recording, without letting go. However, as soon as I half press the shutter whilst filming in crop mode, the display turns pink (again with the preview option set to "Canon").
Shutter half or fully pressed, pink liveview:
