xchat-gnome crashed with SIGSEGV in gtk_icon_theme_lookup_by_gicon()

This is probably a dupe of bug 1107226, which I recently filed. I want to see if the stacktrace comes out any different. Because this one occurred right after I tried to open the 'File Transfers' window, from the main menu. That wasn't the case in that other crash.

Here is the relevant section from .xsession-errors:

(xchat-gnome:28975): Gtk-WARNING **: Unknown property: TopicLabel.creation-function
(xchat-gnome:28975): Gtk-WARNING **: Unknown property: ConversationPanel.creation-function
(xchat-gnome:28975): Gtk-WARNING **: Unknown property: TextEntry.creation-function
(xchat-gnome:28975): Gtk-WARNING **: Unknown property: FindBar.creation-function
(xchat-gnome:28975): Gtk-WARNING **: Unknown property: StatusBar.creation-function

I can't tell if that directly proceeded the crash.

Thanks.

ProblemType: CrashDistroRelease: Ubuntu 13.04
Package: xchat-gnome 1:0.30.0~git20110821.e2a400-0.2ubuntu7
ProcVersionSignature: Ubuntu 3.8.0-0.1-lowlatency 3.8.0-rc3
Uname: Linux 3.8.0-0-lowlatency x86_64
ApportVersion: 2.8-0ubuntu2
Architecture: amd64
CrashCounter: 1
Date: Mon Jan 28 22:51:54 2013
ExecutablePath: /usr/bin/xchat-gnome
MarkForUpload: True
ProcCmdline: xchat-gnome
ProcEnviron:
 PATH=(custom, no user)
 XDG_RUNTIME_DIR=<set>
 LANG=en_US.UTF-8
 SHELL=/bin/bash
SegvAnalysis:
 Segfault happened at: 0x7f4cd7e09aae <gtk_icon_theme_lookup_by_gicon+126>: cmp %rsi,(%rbx)
 PC (0x7f4cd7e09aae) ok
 source "%rsi" ok
 destination "(%rbx)" (0x0000079e) not located in a known VMA region (needed writable region)!
SegvReason: writing NULL VMA
Signal: 11SourcePackage: xchat-gnome
StacktraceTop:
 gtk_icon_theme_lookup_by_gicon () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 gtk_icon_theme_lookup_by_gicon () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 gtk_tree_view_column_cell_get_size () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
 ?? () from /usr/lib/x86_64-linux-gnu/libgtk-x11-2.0.so.0
Title: xchat-gnome crashed with SIGSEGV in gtk_icon_theme_lookup_by_gicon()
UpgradeStatus: Upgraded to raring on 2012-06-14 (228 days ago)
UserGroups: adm cdrom dip lpadmin nopasswdlogin plugdev sambashare sudo