By the way: on Freenode it works. There's a problem with Rizon. I asked about it at their #help channel. There's an answer.
13:48 <%Gemini> nothing on our end has channged. I suggest you
figure out exactly which data is causing issues.
13:49 <%Gemini> It's probably just an edge case that doesn't occur often
13:49 <%Gemini> from the looks of it, it seems like your string buffer is
limited to 128 characters, yet an IRC message can be much
longer than that
13:50 <%Gemini> but that's just a guess going by the limited error message