[cairo] shading, take 2

[Thomas Hunger]

Hm, with cairo I have the following problem on my system:
when I compose a surface with an image backend (my gstate->source) against my 
gstate->surface which has an X11 backend, it does not use the repeat ==1 
although it is explicitly set in the pixman backend. Instead it behaves like 
gstate->source->repeat == 0.
Is this some problem of the system I am not aware of or did I break something 
inside of cairo?
Composing X11 against X11 with repeat == 1 works fine. 
thx
Tom