I just installed 13MAR11 build in my T2i. This is the first build installed on this camera. Everything seems to work very well except for Picture Styles. I have tried to load them with the ML firmware running and without. They seem to work normally until I switch the camera to video mode which causes the User Defined profiles to revert to Standard. I have found I can fiddle with these profiles in the camera menu and the changes do stick, but if I attempt to overwrite them using the EOS Utility they simply revert to the Standard profiles, as I had altered them in the camera. The really scary part is that this behavior is the same with or without ML running.