Hi folks. As with a lot of you, I was using this icon set happily, then upgraded Ubuntu to hardy and it all went pear-shaped. I've run the script kindly provided by stefan315 on the Original Glass Icons Page, re-zipped and posted here. No more hacking required!!
Original Glass Icons Page: http://www.gnome-look.org/content/show.php/Glass+Icons+Theme?content=32146
Stefan315 (Wrote the script to fix this): http://www.gnome-look.org/usermanager/search.php?username=stefan315