Ashley just found a solution for the problem of selecting elements outside of canvas when using clicking repeatedly. Solved all my complains about locking mouse to canvas :D Maybe it could be added by default in the HTML on next release ? Just put this on style tag
This will prevent selecting all elements on page. You can still click on them of course. Tested it on Chrome, Firefox and IE9. In Chrome and FF it works perfectly. IE9 doesn't seem to implement it yet.