The whole 'injuries' thing started while FM Live was being Beta tested. Ov Collier (I think) didn't think there were enough injuries in FM, so it was tried out during the Beta using more injuries per game. I think it first hit FM in 08, although it could have been 09, but I've noticed on FM11 that it's actually worse than on FM10.
I've had two games this season where I haven't been able to finish with 11 players due to enforced injuries. I know Ov stated that the players who get injured in games won't be missing for long, may even be available for the next game, and while that is certainly true, how often do you see teams finish with ten men due to injury?
I've had both my first choice midfielders crocked for half a season each, one with a broken leg picked up against Chelsea and one through three different injuries picked up during games. It got so bad I had to buy a new midfield pairing.
My training levels are not set high, and my tackling is normal. I'm past the point of moaning about the amount of injuries as it will always be the same from now on.