How to remove the white frame around thumbnails in ubuntu 12.04

Hi All, have been usng Ubuntu 12.04 for a few weeks now, and after the last update (about 31/01/2012), I've come across the issue where the /usr/share/pixmap/nautilus folder has vanished.
With it, the thumnail_frame image also!!!!

I'm sure during the update to unity-5, config files must have altered the current state of the distro, therefore removing the need for this folder, or renaming the *.png to something else.

However, what remains is now no way that I've found to remove the ugly white border that frames every image including all coverthumnailer thumnails.
I have search the web, scoured the filesystem, tried to locate anything that looks similar to the thumbnail_frame, installed older coverthumb versions, reinstalled the whole OS again just to see if maybe I'd installed something that may have conflicted with the thumnail image. Yet to no avail !

If anyone is aware or knows how to change the nautilus thumbnail frame image in Ubuntu 12.04, either through a config file or *.png image, it would be great, then we could let others know how to change this as well.

Other than that, V 0.8.3 works fine in Ubuntu 12.04 so far that I can see

Thanks