Which steam library menu do you mean? When right-clicking on a game in the game list? If I choose Install game... off of that menu I don't see any problems.
Just tested it again and I can't reproduce the bug. However, yesterday it was definitely present. I updated the nvidia driver from 304.43 to 310.14, maybe this fixed the problem or it was the reboot.
Yesterday this really bugged me but it seems to be fixed now :)
Edit: With steam library menu I meant the game list.
Closing for now, you can reopen if you find a reproducible case.
Nothing extracted yet.
All pop-ups opening upon clicks in the library view lose focus when I click on them the first time and the item in the steam library view beneath the pop-up gets clicked.
Once the pop-up is brought up in front again by clicking on it in the task bar everything works just fine. This happened when installing and when starting a game.
Steps to reproduce:
Hardware Information:
Operating System Version:
Ubuntu 12.04.1 LTS (32 bit)
Kernel Name: Linux
Kernel Version: 3.2.0-35-generic-pae
X Server vendor: The X.Org Foundation
X Server release: 11103000
Video Card:
Driver: NVIDIA Corporation GeForce 8500 GT/PCIe/SSE2/3DNOW!
Desktop Environment: xfce version 4.8