A recent update updated lot of packages on Centos 5. Then next update try to replace x86_64 libs by i686 libs with lot of unresolved dependencies. yum check-update gives: > Obsoleting Packages > tdelibs.i686 3.5.13-9.el6.opt trinity-3.5.13-el5 > trinity-kdelibs.x86_64 3.5.13-8.el5.opt installed > tdelibs-devel.i686 3.5.13-9.el6.opt trinity-3.5.13-el5 > trinity-kdelibs-devel.x86_64 3.5.13-8.el5.opt installed Fortunately, installing tdelibs.x86_64 solves the problem. -- Philippe BOURDEU d'AGUERRE AIME - Campus de l'INSA http://www.aime-toulouse.fr/ 135 av. de Rangueil T�l +33 561 559 885 31077 TOULOUSE Cedex 4 - FRANCE Fax +33 561 559 870