I found a funny one, though it's more of an error than a glitch, because it doesn't affect gameplay. When you're in the garage, go into live timing. The current position of all drivers scroll across the bottom of the screen, and they're known by a three-letter designation, like "BUT" for Jenson Button and "PET" for Vitaly Petrov. One of these is designated "PDR", for Paul di Resta. However, in Formula 1, Paul di Resta is known by the code "DIR". "PDR" is actually the designation for Pedro de la Rosa - and di Resta and de la Rosa both raced in Montreal this year, so they couldn't both be known as "PDR". It's the same reason why Michael Schumacher is "MSC" and not "SCH"; both Michael and Ralf raced together, so there would have been two drivers known as "SCH". That's why Michael's was changed to "MSC" and Ralf became "RSC" when he Ralf entered the sport. So, according to F1 2011, Pedro de la Rosa is racing at Force India.
However, this si the only place this error appears.
I also had another, actual glitch, when I was fooling around with career mode. I chose Virgin, but when the driver climbed into the car, the game displayed a static image of a Hispania nose and front wing with the sounds of the engine cover being removed. Fortunately, I could skip it.