If, for instance, you go into iso-accents-mode, and try to send ĄHola! (with the upside-down bang in front, I don't know if that will appear correctly on SourceForge), it won't send -- the connection aborts.
The same string can be pasted in to TiK or gaim, and received correctly.
I was really hoping it might be possible to chat in multi-byte charsets (in my case Chinese-GB), but it looks like that's not yet possible.
I think I have a fix for that. In toc.el:
(defun toc-encode (str)
;; Encloses STR in quotes and backslashes special characters in it.
;; rewrite by [lennarts/2000-04-13 11:45:53]
(concat "\""
(mapconcat (lambda (ch)
(if (or (< ch 32)
(> ch 127)
(memq ch
(eval-when-compile
(mapcar 'identity "()[]{}$\"'"))))
(format "\\%03o" ch)
(char-to-string ch)))
str "" )
"\""))