I have it installed. I was particularly interested in performance improvements and wanted to test if there is vsync or not. Almost all the differences mentioned by maemofanatics.com are not present. Let me comment only about the changes that are present in leaked WK36 firmware: - You can start a sentece with lowercase. - Image browser is a little faster. Nothing spectacular, only a little improvement and it is still choppy for my taste. - The firmware references fremantle-1.3 repositories and some stuff is not online yet. You cannot install libgles1-sgx-img (>= 0.20090218.51+0m5) for example. Many OpenGL ES based apps cannot be installed for that reason. And for the biggest disapointment: it lacks vsync. The tearing is still noticable even on desktop during scrolling. But the tearing is very much limited. Some apps stopped having tearing at all but at the cost of performance. For example Bounce does not have tearing now but is a little choppy. Others (like Opera Mobile) have tearing limited but noticeable performance decrease. I hoped to test CloudGPS with this new drivers but I cannot get it to run because of libgles1 dependency. I managed to compare the results of tearing tests that can be found here. There is visibly far less tearing (almost none compared to PR1.2) but performance is noticably worse. Flashing back to PR1.2 and advise everybody not to bother with this leak.