This is on Linux, both client and server and happens in survival mode. I should have checked all the information at the top before I added my previous comment. My apologies - first interaction with Mojang's bug tracker.
Confirmed it's still an issue - just happened in 1.7.4. I'm not sure what made it break, but it's 66% broken.
The portal still works and is persistent (returning to the overworld -> nether it's still like that). This is running in survival on a vanilla server from Mojang. I've not restarted the server to see if that restores it to a stable state. I've backed up the files in case that will help with debugging.
Confirmed it's still an issue - just happened in 1.7.4. I'm not sure what made it break, but it's 66% broken.
It still works and is persistent (returning to the overworld -> nether it's still like that). This is running on a vanilla server from Mojang. I've not restarted the server to see if that restores it to a stable state. I've backed up the files in case that will help with debugging.
Launcher 1.6.84-j launches unmodified game, but still fails to launch liteloader-modified. Error is still: