On RHL 6.1 the options "owner" (used in fstab) and "users" (used in the fstab man page) are not mentioned in the "mount" man page which should list all options.
This is already fixed in the latest version of mount in Raw Hide (ftp://ftp.redhat.com/pub/rawhide/{arch}/RedHat/RPMS/).
Ah, I found the description, thanks! It should be listed as a separate option, though, it is easily missed when browsing quickly through the man page.