I don't know if this is right forum, but I just came across an error. Running ver. 1729277 (May31) on 5DM3. CF card SanDisk 32 Extreme Pro (90MB/sec). While running random tests, with LV in M Movie Mode got err70 twice, after about 4-5 min of running the test. After removing battery all was OK. Don't know if this interests anybody, just want to help somehow to make it better.