Hello Metzge, That is correct that VMWare 6.7 U3 is not supported yet.  It will be supported in the future , but I am not sure of the release date that it will be. Please let us know if you have any other questions.
Setting up a new ME4024 SAS with a couple of VMWare hosts.  Looking to use VMWare 6.7 U3 but according to the compability matrix VMWare 6.7 U3 isn't supported yet.  Is that true?  See link below for matrix: [URL]
Powervault ME series suppor for VMWare 6.7 U3?