I've noticed that there is a little give in my camera system at the EF mount. It is really hard to see, but I can feel it sometimes and first noticed it when I had the lens attached to a monopod and gripped the camera body. Even though I was supporting all the weight with the monopod I could still feel the body shifting around slightly. This seems to happen with my more expensive equipment and my cheaper equipment, but if there's something wrong I want to make sure I get my expensive equipment in for repairs before the warranty expires.
Thank you.