I just used a brand new 85 1.8 at a volleyball game last week and got the error 99 turn off or reset the battery message at least 5 times during the match. I shot on manual, autofocus, ai servo, 10fps and got locked out. I have only experienced the error 99 message maybe 2 times since receiving the camera June 07. What do you all think? Do I have a faulty lens?

