Created attachment 307666 [details]
screencast

This is the issue that has prevented me from using Epiphany for plus.google.com for a long time. If you load a G+ page, such as https://plus.google.com/+ZeeshanAli/posts  you will notice that sometimes the scrollbar on the right is styled by the webpage, sometimes it is the native gtk scrollbar... and you can trigger this by repeatedly reloading the page until you get the gtk scrollbar instead of the styled scrollbar.

Now, I don't actually care about the styling, but the thing is that I noticed that the scrollbar sometimes "breaks" and stops responding, and this often happens when it is in gtk style... you can't scroll with the mousewheel or clicking on the scrollbar. Very odd.

Screencast attached (for the styling issue).