javanse

Yes, it also happens without Glass8. So it seems it's related to Firefox, maybe because FF uses its own theme on Win10 instead of the default one. Firefox 41 beta 2 Official release just before the weekend sound great, go for it. :up:

@bigmuscle: When i was using Build 120, and right-clicked on running programs on the taskbar, there were small horizontal and vertical lines occasionally in the menu, just below the jumplists. Unfortunately, i don't a screenshot of this behaviour. Now with Build 160, i haven't seen that bug yet, so it seems you already fixed it. But there's a new bug which wasn't present in build 120, only affecting Firefox but not Chrome. On the top window bar, one can see the classic interface instead of Aero when interacting with the window, like maximizing or dragging. Sometimes, the whole window bar except for the active tab gets "classic" while the active tab stays "aero". You can see this in the attached screenshot. Two displays in extended desktop mode, Windows 10 Pro 10240 + Start10 + Glass8 1.3.2.160, all vanilla, no custom themes.