Problem with Irssi::signal*

Hello,

I tried sending this to the irssi-scripts mailing list, but it looks
fairly dead/unresponsive.

So here's the content:

I'm running into a problem while trying to do a perl script.
I'm running irssi 0.8.11 (20070425 1813) on freebsd, and I have never
had any problem with any script previously. I compiled this irssi
myself(not a packaged binary).

Here is a testcase:
http://rafb.net/p/zBmKme67.html
Load it and run it with /testcase

When I do that here, I get the following warnings:

Can't locate package Irssi::Nick for @Irssi::Irc::Nick::ISA at (eval
yy) line xx.

Commenting out the foreach line removes the warnings.
The case is sufficiently simple so that maybe someone can help me
figure out why it's doing that?
Is it reproducible for anyone else?

Thanks for any help,

Paul-Kenji Cahier