1 unicode character can be upto 4 utf-8 characters in ascii count (i.e. 4 bytes).

xchat has already adjusted for this issue, it would be nice if mirc adjusts for this issue too.

Quote:

- Support receiving 2048 bytes per line from server and dcc-chat, so we can support 512 UTF-8 characters that some servers now send.

http://66.102.9.104/search?q=cache:0SwBOBN15BMJ:www.winfuture-forum.de/lofiversion/index.php%3Ft56045.html+xchat+unicode+2048&hl=en&ct=clnk&cd=3

quote says 512 UTF-8, but it means 512 Unicode characters in UTF-8 format.