I forgot: I'm running Xubuntu 14.04.
Same thing happens in KDE.
No updates in two years?
Most likely the same issue as #6.
I have a similar problem, also with the drop down menu. The window loses it's focus everytime a drop down menu expands (on hover over the buttons "Store" "Library" etc..)
I recorded a video on how this effects my Gnome Shell on Manjaro Linux:
Video:
https://www.youtube.com/watch?v=df5eBYJLWXw
My system informations steam report:
https://gist.github.com/MadByteDE/e1189a974d9d2e5a35f52fa9a686d6fb
Nothing extracted yet.
The Steam Client doesn't seem to be fully adjusted to the opacity capabilities of my system. I have set inactive windows to only be around 60% opaque. And that works fine. Except with Steam. Whenever I hover the mouse over the navigation, or click on something from the file menu, which brings up menus of their own, the main Steam window turns transparent. It shouldn't.
(Support sent me here. They told me to "post your questions directly to our developers as they can assist with these issues better and more efficiently.")