I've had trouble viewing quicktime movies in Google Chrome and Safari browsers. Sometimes I get the error message "Quicktime plug in 7.7.1 has crashed". I've tried reinstalling Quicktime (iTunes) which was recommended by Apple tech support. They also said it must be an issue with the particular browsers. I searched on the internet and apparently other people are having this problem too. I'm on an iMac in Lion 10.7.5 OS. I have the latest Chrome and the latest Quicktime I think (10.1).