acroread needs ia32-libs-gtk

On Squeeze, I installed acroread. Running it failed with

/usr/lib/Adobe/Reader9/Reader/intellinux/bin/acroread: error while
loading shared libraries: libgdk_pixbuf_xlib-2.0.so.0: cannot open
shared object file: No such file or directory

I fixed it by installing ia32-libs-gtk, so that should probably be
listed as a dependency.

-Rob