Comment 1 for bug 434053

Hi, you can try to install the patched nautilus that launches gloobus-preview just pressing space, then, you can unbing ctrl+space and use it as normally.
To install the patched nautilus you just need to add the repostitory and so a

sudo update && sudo dist-upgrade

Anyway, in my blog there are detailed instructions http://gloobus.wordpress.com/2009/09/08/ppa/

I hope it works for you.

Tought, if you don't want the patched nautilus you can bind gloobus-preview to another shortcut, you can do it following those instructions:

http://www.mumbojumbodaily.com/step-by-step-implement-mac-like-quick-look-in-ubuntu-with-gloobus-preview

See you!