There has been a big bad bug lurking around the VMware 6 release – the CBT bug. (CBT: 191: No memory available!)

This bug affects everyone that uses CBT for example every backup software using CBT. So when Veeam announced there support for vSphere 6 last month it was pretty much useless because of the bug VMware had.

BUT now VMware has release a fix for the bug here http://kb.vmware.com/kb/2114076