No more crashes so far, but sometimes streaming videos (Youtube, Netflix, HBO GO, etc) have problems... Like if I'm watching Netflix in one tab and switch to another tab, the image from the Netflix will appear in the tab I switch to, stuck on whatever image was there. Any object or link I mouse over in that tab (whatever site is open) will appear, and eventually the whole page will appear in the tab. I was trying to re-create this problem (switching between tabs, pausing/playing the video, switching between tabs again) to take screenshots, but doing so caused Silverlight to crash. Might be worth looking into.
 
This is with overlay on or off.