The first release with the fix for [1] was in 0.3.0.3-alpha [2].
So if you run an IPv6 exit, upgrading to 0.3.0.3-alpha potentially increases the tor network's IPv6 exit capacity.
teor and nickm plan a backport for tor 0.2.9.x
[1] https://trac.torproject.org/projects/tor/ticket/21357 [2] https://lists.torproject.org/pipermail/tor-talk/2017-February/042900.html
These 47 exits account for more than 8.6% exit probability and currently do not allow IPv6 exiting (either due to this bug or due to missing IPv6Exit 1' or exit policy)
+--------------------+--------------------------------+---------------+ | nickname | contact | tor_version | +--------------------+--------------------------------+---------------+ | ori | 0x02225522 Frenn vun der Enn ( | 0.2.9.9 | | tollana | 0x02225522 Frenn vun der Enn ( | 0.2.9.9 | | kree | 0x02225522 Frenn vun der Enn ( | 0.2.9.9 | | rejozenger | 0x21DBEFD4 Rejo Zenger <rejo@z | 0.2.9.9 | | Unnamed | 0x3C68C8DBCBA783EF Joel R. Vos | 0.2.8.12 | | torpinkbyte | 0x60C0742D1F357D42 Sergey Popo | 0.2.8.12 | | marylou2 | 0x9F29C15D42A8B6F3 Nos oignons | 0.2.9.8 | | ekumen | 0x9F29C15D42A8B6F3 Nos oignons | 0.2.8.11 | | marylou1 | 0x9F29C15D42A8B6F3 Nos oignons | 0.2.9.8 | | armbrust | 0xBA61EB09 Michael Armbruster | 0.2.8.9 | | AlphaCentauri | 0xD3364A0B Spydar007 <tor.abus | 0.2.9.9 | | Unzane | 0xFDB8716D Gerald Turner <gtur | 0.2.5.12 | | thirdexit | <demfloro AT demfloro dot ru> | 0.2.9.9 | | dredis | <demfloro AT demfloro dot ru> | 0.2.9.9 | | modio1 | <take AT modio dot se> | 0.2.8.12 | | thisisatorexitnode | Abuse <abuse .AT. uk .DOT. aql | 0.2.9.9 | | xshells | Admin <admin AT xshells DOT ne | 0.2.7.6 | | blackpearl | BlackPearl <tor-op(at)wach-it- | 0.2.9.9 | | CrashM | CrashM <crash AT crashm d0t co | 0.2.8.9 | | SentriesExit2 | echo gbeznfgre1609@fragevrf.be | 0.2.9.9 | | SentriesExit1 | echo gbeznfgre1609@fragevrf.be | 0.2.9.9 | | TastyStrawberry | Fabian Bakkum <fabianbakkum@ho | 0.2.9.9 | | kramse2 | Henrik Kramshoej <hlk AT zencu | 0.2.8.9 | | kramse | Henrik Kramshoej <hlk AT zencu | 0.2.8.9 | | w000000h00000 | http://torexitnodev6.dynv6.net | 0.2.9.8 | | criticalmass | https://www.torservers.net/don | 0.3.0.2-alpha | | iVPN | https://www.torservers.net/don | 0.3.0.2-alpha | | zwiebelfreund3 | https://www.torservers.net/don | 0.3.0.2-alpha | | dorrisdeebrown | https://www.torservers.net/don | 0.3.0.2-alpha | | russellteapot | https://www.torservers.net/don | 0.3.0.2-alpha | | zwiebelfreund2 | https://www.torservers.net/don | 0.3.0.2-alpha | | NeelTorExitCZ | Neel Chauhan <neel AT neelc DO | 0.3.0.1-alpha | | NeelTorExitRU | Neel Chauhan <neel AT neelc DO | 0.2.9.8 | | lupine | Nick Thomas tor@ur.gs | 0.2.9.9 | | heteigenwijsje | Random Person <gijsje+tor AT h | 0.2.7.6 | | Unnamed | Random Person <tor0102.10.swsn | 0.2.9.9 | | Unnamed | Random Person <tor0102.10.swsn | 0.2.9.9 | | artikel5ev3 | see https://www.artikel5ev.de/ | 0.2.8.9 | | artikel5ev2 | see https://www.artikel5ev.de/ | 0.2.8.9 | | artikel5ev1 | see https://www.artikel5ev.de/ | 0.2.8.9 | | artikel5ev5 | see https://www.artikel5ev.de/ | 0.2.9.8 | | UniversidadGalileo | System Administrators <sysadmi | 0.2.8.11 | | corewars | TOR Administrator <tor AT core | 0.2.8.12 | | tordienet | tor@die.net | 0.2.9.9 | | PrivacyExit1 | tor@lite.litedsl.nl | 0.2.8.9 | | torwedos | Viktor <vnikolov AT vnikolov d | 0.2.9.9 | | torwedos2 | Viktor <vnikolov AT vnikolov d | 0.2.9.9 | +--------------------+--------------------------------+---------------+ 47 rows