conflict in SuSE's 9.3 apt depository for gnome

When I try to install certain gnome packages in 9.3 with apt, I get the following message (between two packages provided in that depository): file /opt/gnome/share/themes/Clearlooks/gtk-2.0/gtkrc from install of gnome-themes-2.11.91-3 conflicts with file from package gtk2-engines-2.6.4-5 mikus