I already posted this in the Bug Thread in the DD Forum section, but I am not entirely sure that maybe it's just me.
The problem is that until recently, the DD client started to flicker very heavily for me to the point where it is unplayable anymore. I tried one or two other unity-apps (though not in the browser), they seemed okay.
Here is a screenshot of the flickering.http://i.imgur.com/UHypg.jpg
I use OS X 10.7.2 with Firefox 7.01 though the bug also occured with Safari 5.11. I downloaded the newest Unity engine, Unity Plugin version: 3.4.1f5
Unity Engine version: 3.4.1f5
Although the bug started occuring in an older unity version (that's why i decided to upgrade).