too long to past the themes that do collide, but you can find them easily I think.
The whole upgrade path for splitting a package into two is horrid. I didn't want to add a blocker for !<x11-themes/gtk-engines-murrine-0.90.3-r1 to murrine-themes. Is there another way around it?
I added the blocker, can't see any other way of fixing the bug.