which package is resposible for displaying images (e.g., on buttons)?

[michael kapelko <kornerr gmail com>]

i'm compiling gnome-2.14.2 now, i've compiled 1/3 so far, and replaced 
old packages with new ones, but now i can't see any images on buttons 
now. and GIMP doesn't show preview, it says type is not supported.
i must have wrong compiled some package?
which one? and how to compile it correctly?
currently i'm using xfce-4.2.

thanks.