Now properly implements a customized TravelAgent for the Nether. Normally portals from the Overworld to the Nether will only search or create from layer 128, down. TallNether will now scan up to the entire 256 height for Nether portals when traveling from the Overworld (traveling from the Nether back to Overworld is unaffected). In certain cases this change may cause a portal above 128 to connect to a different portal that was ignored in the past.
In case of issues there is a new setting: special-travel-agent
Setting this to false will revert to using the vanilla Minecraft portal handling.
This update is recommended for all users.
An update for 1.12 compatibility will be coming soon as well.