I saw item
#759 is closed however I installed ML for the first time on my EOS 600D, with the 11.12.22 zip files.
When I half press the shutter release button in 'P' mode nothing happens, however it does work when in 'A' mode. I tried re-booting without ML, by holding the shutter release button, and that does not seem to work -- in other words ML always seems to load.
I uninstalled ML for the time being and will keep checking back here for feedback.