Here is a fix for the progress bar. Replace this:
# Progress bar
%V(0,0,-,8,2)
%x(a,pbbackground.bmp,0,0)
%xd(a)
%pb(0,0,128,6,pb.bmp)
with this:
# Progress bar
%V(0,0,-,8,2)
%pb(0,0,128,6,-,fill,slider,pb.bmp)
or download the attached .wps file and drop it into your player's .rockbox\wps folder.