There are a number of issues related to passing the sizeof(sockaddr_storage) to APIs expecting the actual sockaddr_in or sockaddr_in6 length. The APIs are getnameinfo() and XdmcpFlush.
There are also issues with logged messages displaying the IP address instead of the hostname. The fix required changing two files, the patch and the spec file to incorporate the patch. The patch file is here: ftp://ftp.the-nelsons.org/pub/solaris-gdm.patch