CBZ not displaying...

I downloaded the latest version (1.1) and quick look doesn't seem to be able to look into CBZ files, but CBR works just fine...

I also opened up the info.plist, and searched it and I did find cbz in there, so I'm not sure what's going on.

The cbz declaration is in the Info.plist file on lines 187 and 254 - I just checked. Have you replaced it with the cbz-less version you can download from here?

There is another QL generator that can display the images in a comic book files which you might be interested in: Simple Comic. Actually, this is a comic book reader that includes a QL generator.