I m not real sure its a problem with your templates. Thats why I post here and not in the facelift thread but I think it comes from the combination of both hacks.
To install your facelifts with my board I use BeyondCompare to find out the differences. I have lots of other hacks in it so this was the easy way for me. The main problem is that I dont know when the the bug first time appears
But I m sure if it in with 6.4 my Admins and Mods have noticed me. So this must come with 6.4.1 Update.1
As I noticed, Quickreply will be a part on the 6.5 Infopop release.
A finished modification from you would be a great help.