Has anyone seen this happen?
- Dual card recording - separately
- Slot 1 (CF); Lexar 8GB Platinum II (200x); Recording High RES JPEGS (Smooth profile)
- Slot 2 (SD); SanDisk 32 GB Extreme Pro SDHC; Recording CR2 RAW files
I shot over 8000 images with the 5D MK III but never had any problem with the raw or jpeg file corruption.
What is the write speed of your SDHC card?
Also, have you updated to the latest firmware?
I believe your CF card speed is 30MB/s
I might be wrong but your problem most likely is your memory card(s)
5D MK III, 16-35/2.8 L II, 24-70/2.8 VC, 24-105/4 L IS, 70-200/2.8 L IS II, 100/2.8 L IS, 40/2.8, 50/1.4, 85/1.8, 150-500 OS, 600EX-RTx2, ST-E3-RT, Rokinon 24/3.5 T-S, D7100+18-300 VR, YN568EX, 055CXPRO4+468MGRC2, 190CXPRO4+322RC2, Gorillapod Focus+496RC2, CamRanger, B+W filters, Konova K3/31.5 etc