I'm not sure if this has been reported yet (I could not find it in a quick search - sorry if I missed it), but if not mentioned yet, then you will want to be aware of it. On May 20th these 4 RPMs showed up in the errata tree, with both .sl6 and .el6 naming: $ ls -tlr openssl-1.0.1e-48.* -rw-r--r-- 1 root May 20 07:46 openssl-1.0.1e-48.sl6_8.1.i686.rpm -rw-r--r-- 1 root May 20 07:49 openssl-1.0.1e-48.sl6_8.1.x86_64.rpm -rw-r--r-- 1 root May 20 12:20 openssl-1.0.1e-48.el6_8.1.x86_64.rpm -rw-r--r-- 1 root May 20 12:21 openssl-1.0.1e-48.el6_8.1.i686.rpm On an SL 6.7 server you might have updated openssl on or after May 20. This will result in your node have openssl-1.0.1e-48.sl6_8.1.x86_64 installed -- note the .sl6 in the release number. Then at a later date you may have updated the server to SL 6.8. In the SL 6.8 errata tree only openssl-*-1.0.1e-48.el6_8.1.*.rpm exists -- note the .el6 in the release number The upshot of this is openssl-1.0.1e-48.sl6_8.1 is technically at a higher version than openssl-1.0.1e-48.el6_8.1 because of the alphabetic ordering. Now if you decide to install openssl.i686 or openssl-devel on your newly updated 6.8 node then you will have a problem: # rpm -q openssl.x86_64 openssl-1.0.1e-48.sl6_8.1.x86_64 # yum install openssl.i686 Loaded plugins: refresh-packagekit, security Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package openssl.i686 0:1.0.1e-48.el6_8.1 will be installed --> Finished Dependency Resolution Error: Multilib version problems found. This often means that the root cause is something else and multilib version checking is just pointing out that there is a problem... yum cannot find an i686 matching version of the openssl RPM in the SL 6.8 errata tree. So in this case the work-around is to grab the openssl.i686 0:1.0.1e-48.sl6_8.1 version from the SL 6.7 updates tree to install it locally: # yum localinstall openssl-1.0.1e-48.sl6_8.1.i686.rpm ... --> Finished Dependency Resolution Dependencies Resolved ... Running Transaction Installing : openssl-1.0.1e-48.sl6_8.1.i686 Verifying : openssl-1.0.1e-48.sl6_8.1.i686 Installed: openssl.i686 0:1.0.1e-48.sl6_8.1 cheers, etc. -- deatrich @ triumf.ca, Science/ATLAS PH: +1 604-222-7665 <*> This moment's fortune cookie: "Keep your stick on the ice.." - Red Green