User Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:11.0) Gecko/20100101 Firefox/11.0 Build ID: 20120312181643 Steps to reproduce: I use windows 7 with large text (user resolution - 200%). It works fine but many flash games sucks. Take for instance Lemmings, Students Park http://www.8c.com/en/games/352/lemmings_student_park/ Some of the clickable buttons flicker on mouse hover and clicking is probabilistic -- I have to click many times before click succeeds. The probability of click to fire the event is inversely proportional to the page zoom. I have to Zoom In to enable all buttons. Zooming out, reduces the probability to zero -- no button can be clicked. IE has no problem.
As of Firefox 14, the problem seems disappeared. I have also discovered that it is a duplicate of https://bugzilla.mozilla.org/show_bug.cgi?id=690744 https://bugzilla.mozilla.org/show_bug.cgi?id=510846
It seems that the problem was resolved by the "protected mode" in the Flash, that has other problems (browser freezing), https://bugzilla.mozilla.org/show_bug.cgi?id=812498