]# yum update Loading "priorities" plugin Loading "fastestmirror" plugin Loading mirror speeds from cached hostfile * base: mirror.hmc.edu * updates: mirrors.versaweb.com * kbs-CentOS-Extras: centos.karan.org * extras: centos-distro.cavecreek.net Excluding Packages in global exclude list Finished Excluding Packages from CentOS-5 - Base Finished Excluding Packages from CentOS-5 - Updates Finished Excluding Packages from CentOS.Karan.Org-EL5 - Stable Finished 0 packages excluded due to repository priority protections Setting up Update Process Resolving Dependencies --> Running transaction check ---> Package xulrunner.x86_64 0:1.9.0.1-1.el5_2 set to be updated --> Processing Dependency: gecko-libs = 1.9 for package: nspluginwrapper --> Processing Dependency: gecko-libs = 1.9 for package: nspluginwrapper ---> Package yelp.x86_64 0:2.16.0-20.el5_2 set to be updated ---> Package firefox.x86_64 0:3.0.1-1.el5.centos set to be updated ---> Package firefox.i386 0:3.0.1-1.el5.centos set to be updated --> Processing Dependency: gecko-libs = 1.9 for package: nspluginwrapper --> Processing Dependency: gecko-libs = 1.9 for package: nspluginwrapper ---> Package xulrunner.i386 0:1.9.0.1-1.el5_2 set to be updated --> Finished Dependency Resolution Error: Missing Dependency: gecko-libs = 1.9 is needed by package nspluginwrapper Something missing? mhr