Thanks for your bug report.
If you want, i have a debug enabled package for Dapper http://www.cerkinfo.be/~kujo/xchat-gnome_0.11-0ubuntu5_i386.deb
I suppose it should work with Edgy too.
** Changed in: xchat-gnome (Ubuntu)
Status: Unconfirmed => Needs Info
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xchat-gnome crashes on start up
https://launchpad.net/bugs/51305