I have been trying to find the right UI for my Warrior, and recently came across Arie's UI. I decided to switch the unitframes to pitbull instead of Xperl. After removing Xperl and installing PB, I got nothing but the default Unitframes.
I then did everything I could to fix the problem, removed the WTF file, deleted the interface file and just have pitbull in there, and still could not get pb or any other unitframe to show. Not sure where the problem is but I could use some help.