gtk-devel gtk2-devel, glib-devel, glib2-devel clashing?

When I tried to compile a bunch of gnome apps I didn't succede till I uninstalled glib-devel and left just glib2-devel, the same happened for gtk(2)-devel. Now I'm trying to compile sylpheed-claws and it requires gtk(1) stuff (really?). Could someone enlight me about version issues and lib clashing? Did I just do a mess installing/uninstalling libs or is it a known issue or what?