I've been switching between windows 10 mobile build 10512 and wp8.1 on my Lumia 925 because for some odd reason, when using windows 10 mobile, there is an unusual and evident lag when scrolling (both vertically and horizantly) - it looks like there's a speed bump on my screen! When I revert to wp8.1, there are no problems at all. And ofcourse the battery drain is worse than build 10166. Is anyone else experiencing this problem with windows 10 mobile builds? I actually enjoy windows 10 mobile over wp8.1, but these two issues are making it almost impossible to use my lumia