Perian gave Finder broken 'click to preview' UI feature. Now, how do I get rid of it?
Alright, here's how I got rid of
- FLAC files having those ‘click to play' icons and their ensuing endless 'preview loading' spinning wheels.
- FLAC files with those Quicktime/iTunes style music icons 

We don’t want either because at least in 10.9, neither Quicktime nor Finder nor Quick Look can play them (even with Perian installed). A fresh installation of OS X simply gives you no option to play FLAC files whatsoever, but when you uninstall Perian, which is supposed to let you play such exotic formats, the option to preview FLAC in Finder et al is not removed.

Apparently the problem is caused by Perian associating FLAC files with the Quicktime Player. 


Right click on a FLAC file with a specious ''  
Choose 'Open With' and select 'Quicktime Player'
Quicktime Player says ‘converting’ in the video window for a couple of seconds then gives you a dialogue box saying it cannot play the FLAC file after all.
Close Quicktime
Close Your Finder windows and reboot OS X.


Think of this as a way to completely remove all traces of Perian after you've uninstalled it.

Now when you interact with FLAC files in Finder they should look like this again: