Got another minor one for ya. The notification count clips the envelope icon when I have >9 notifications.

F6 menu says it's in /resource/layout/steamrootdialog.layout, container SteamRootDialog / CSteamRootDialog, and the selection is Inbox Button / CInboxButton.

I'm able to replicate the issue by setting my Steam to English, so it's not a localisation issue.

Pixelvision² build dated 2016-06-29, Steam build dated 2016-07-08 14:48:42. Windows 7 build 7601 x64. I'm using the Smaller Big Picture Icon and Steam Piston overrides.
The following items in my settings.ini are uncommented:
- Alternative Font
- Tweak: Game Title Background (Library, Details view)
- Tweak: Replace Big Picture Mode Icon (Use Controller Icon)
N.B.: I'm about to clear out the comment notification, so that'll drop me back to 9. If you need to bring it back up to 10, let me know and I'll drop my Steam profile link - comments should be open.