-e: when you have custom cursors in Unity and someone else uses custom cursors too the unity cursors start flickering

reproduces on Win7 & FF, works fine with IE + Chrome

-repro:
--build and run the attached HWCursor project in FF
--open a new FF window
--run http://www.kongregate.com/games/ShurikMur/space-flash-arena in that new window, start a game till you see the custom cursor/targeting thingy
--switch back to Unity and hover the cursor over the different boxes
--NOTICE the cursor flickering between the custom and the standard one