For the device-specific module (DSM) named Microsoft DSM, versions do not match between node CL-N01.contoso.com and node CL-N02.contoso.com. The Cluster validation of a couple of Servers 2012 R2 failed with VMM and the Failover Cluster Manager as well.
Yesterday the 15.05.2014 was a regular patchday at Microsoft and the KB2955164 gave us a different QFE Level. It steps up from 16384 to 17088. The Microsot DSM differs and the Validation Fails on machines who have a different patch level. unfortunately it seems some machines have troubles to get the patch and install it properly so the Validation crashes.