So, my new 5DII is not as sharp right out of the box as my previous 40D with the same 50mm 1.4. I probably had to put in some microadjustment, but never had time to play around with the camera.
I didn't think much about it. until, my son drops the 5Dii with the 50mm attached at about 2.5 feet onto hardwood floors. That's arm level for a 2 1/2 year old. There was no visible damage to the body, but the 50mm just won't focus clearly anymore.
So I just put on another lens. The 5Dii focuses fine, but I had to put in a 5+ microadjustment to make it sharp. So, now I don't know if it was the recent fall that necessitated the microadjust or it was from the beginning.
Other than going out and shooting some pics. How do I check the body for damage? I'm still within the return period, but it may cost me a little.
[Update]
returned both for new ones. why take the chance

