Hi,
I got a problem : I would like to use lazy mouse while masking but it doesn’t work (tried to turn it on and off, nothing changes as soon as you begin masking).
Any help would be more than welcome ! 
Arg, wrong forum, can it be moved please ?
Sounds like you are still using 3.5. Release 2 of 3.5 includes an update to masking “Masking can now be applied with LazyMouse with or without Backtrack modes.”