Make sure that you also have the updated version of the camera profiles for LR, and try one of them and not just the Adobe default one.
I've heard a few complain about too much magenta, and usually it has been due to them not having updated to Lightroom 2.4 and been shooting in sRAW.
Although, some even say that Canons own software do not display this magenta shift (even after updates of Camera Raw, LR, etc), so it's something that happens, but we haven't figured out what it is yet.


