Had a shoot today using 6D with Sandisk Extreme 32gb 45/mbps card. Played back several clips during the shoot, no issues.
Shut down camera, went home, ejected card, plugged into Macbook and the card shows 0 files. Tried 2nd Macbook Pro and same issue.
Put card back into camera, turned it on, got a ML message saying "improper shutdown, skipping modules" (happened 3-4 times in the past few weeks). Pressed playback button, camera says "no images"
Hoping disk recovery software works...