Hi, cant find anything exactly like this on the forums - coverflow and quicklook are only working (displaying any preview) about 25% of the time - usually after a reboot, for an indefinite period of time, then it just stops showing anything.

this happens with all document types: jpegs, .docs, cs3 docs, all of them. i did a regular upgrade about a 2 weeks ago, been having this problem pretty much from the start.

any ideas?