I just had my 5D3 returned from Canon Repair for correction of the light leak on long exposures and a general 18 point cleaning. My camera is acting funny. Aside from having to re-set all of my custom button settings, etc, I noticed that when in Av mode and taking a photo, if I try to rotate the Quick Control dial for some EV compensation while pressing the shutter halfway down, the shutter speed in the viewfinder changes to the letter "L" and the center mark on the exposure bar does not move. Also, I selected a 3x3 grid to show but it does not. Any ideas? I've emailed Canon and will try to call but if there are any quick fixes for this let me know. Thanks.