Comment 4 for bug 1310356

I am also seeing this bug (since Trusty), and it's quite annoying!

The duplicated bug describes it better.
When the application loses focus, the scrollbars turn gray, sometimes.
When it regains focus, sometimes the scrollbars stay gray.

This is a big usability issue, because a gray scrollbar on a white background is hard to see.
It's even worse when the background is also gray (like in the Software Center).
It's also ugly.

Could someone look into this?
This report seems forgotten (the last message was in April).