diff -r fa5ec7eaa0a0 -r 145dfc6b5f29 pidgin/gtkprefs.c
--- a/pidgin/gtkprefs.c	Sat Feb 09 03:09:13 2008 +0000
+++ b/pidgin/gtkprefs.c	Sat Feb 09 06:11:27 2008 +0000
@@ -976,7 +976,7 @@
 		fontpref = pidgin_prefs_checkbox(_("Use font from _theme"), PIDGIN_PREFS_ROOT "/conversations/use_theme_font", vbox);
 
 	font_name = purple_prefs_get_string(PIDGIN_PREFS_ROOT "/conversations/custom_font");
-	font_button = gtk_font_button_new_with_font(font_name ? font_name : NULL);
+	font_button = gtk_font_button_new_with_font(font_name ? font_name : "");
 	gtk_font_button_set_show_style(GTK_FONT_BUTTON(font_button), TRUE);
 	hbox = pidgin_add_widget_to_vbox(GTK_BOX(vbox), _("Conversation _font:"), NULL, font_button, FALSE, NULL);
 	if (purple_prefs_get_bool(PIDGIN_PREFS_ROOT "/conversations/use_theme_font"))