Currently Being ModeratedSep 13, 2013 2:04 PM (in response to Foques)
Your screenshot is missing. Not sure if it's just me. By the way, the feature you're talking about is called QuickLook, and is unrelated to Preview.app. If you hunt in your Library folders you may find something related.
Currently Being ModeratedSep 13, 2013 9:31 PM (in response to Scotch_Brawth)
and thank you very much for correcting my mistake.
now, that I was looking at the right piece of software, I was able to figure it out, and we're good to go.
here is what the problem was: