realvnc enterprise have the patch
tightvnc have the patch dI id not find again the url.
ultravnc, ipv6 patch could be added with donation for work ?
only few limited/advanced users/developer can test it
UltraVNC 188.8.131.52.1 (built 20110518) OS Win: xp home + vista business + 7 home only experienced user, not developer