This patch fixes a buffer overflow (causing a segfault) that would happen if an ISO-8859-1 client sent a string consisting of many instances of a single extended character (å, ä, ö etc).
The patch is against FiSH v1.0-RC5, and is only relevant if you use the recode support in FiSH.
The side effect of this patch is that lines that would previously make irssi segfault will now be cut off (due to limits with the structure of irssi modules).
You can download the patch here: FiSH-irssi.v1.00-RC5-recode-segfault-fix.patch