No, I can confirm that I'm definitely still getting this issue on the VCSA 6.5a (4944578) installer, upgrading from vCenter 5.5 (1750787) on Windows.
I'd also like to point out that the KB article says to insert the ::1 line into the middle of the hosts file, inside the "VAMI_EDIT" block, which never worked for me -- checking after its failure, the line I'd inserted was absent, so I think that block gets overwritten -- and that appending the line to the end of the file (via the '>>' redirector) did the trick.
