John R Pierce wrote: > I just installed 5.3 about a week ago, fairly minimal install, x86_64 > platform... then upgraded to 5.4 this AM, and just installed firefox > > $ sudo yum -y install firefox > ..... > Installed: > firefox.i386 0:3.0.12-1.el5.centos firefox.x86_64 > 0:3.0.12-1.el5.centos > > $ firefox > Could not find compatible GRE between version 1.9.0.12 and 1.9.0.12. you installed both i386 and x86_64 versions... try removing the unwanted one?