Did you open a case for this? If so, what's the case number?  glen
I was wondering if anyone has run across this before.   I have a Storage group with 18 ESX 4.1 hosts.   I went to add another host and i can see that about 6 of the hosts are not listed in the "Host to be connected" box.   I went into engineering mode and selected the "advanced" button and those same host do not show up there either.  I then looked at connectivity status and all 18 hosts are listed with the correct storage group as well as being logged in.  Inside Vmware, those missig hosts can still access all datastores.  The reason i ask is i need to add another host to that group and i am wondering that if i did,  when i hit apply that it would remove those 6 hosts since they were not listed in the window.
Storage Group hosts missing from list but still connected.