In Gnome 3.4 on Fedora 17 (64 bit) no single keyboard shortcut works in the activities overview. Not only the custom keyboard shortcuts from the settings menu but even simple hotkeys like volume or brightness control (on my laptop) don't work while in activities overview.
Especially, I can't take screenshots of the activities overview using the "print screen" key. In every other situation on the desktop or with an opened window the print screen key will save a screenshot in the images dir in $HOME. But in activities overview it simply doesn't trigger any action at all.
Somebody from a German forum told me, that for him keyboard shortcuts are working in activities overview using Debian with Gnome 3.4. So this seems to be fedora related and not upstream.
Any ideas? Should I report this issue as a fedora bug?