Change font doesn't work

While trying to reproduce bug 631669 I found that chmsee doesn't apply font settings: It remembers them on a per file basis (which is odd, and probably not the intended behavior) but doesn't apply them.
I've tried to change the fonts size and also change font's to no avail in 2 different chm books.

From the command line I get this:
** (chmsee:9159): CRITICAL **: cs_html_webkit_set_variable_font: assertion `IS_CS_HTML_WEBKIT (html)' failed

** (chmsee:9159): CRITICAL **: cs_html_webkit_set_fixed_font: assertion `IS_CS_HTML_WEBKIT (html)' failed

(chmsee:9159): Gtk-CRITICAL **: IA__gtk_recent_manager_add_full: assertion `uri != NULL' failed

ProblemType: BugDistroRelease: Ubuntu 11.10
Package: chmsee 1.3.0-2ubuntu2
ProcVersionSignature: Ubuntu 3.0.0-11.18-generic 3.0.4
Uname: Linux 3.0.0-11-generic x86_64
ApportVersion: 1.23-0ubuntu1
Architecture: amd64
Date: Sun Sep 18 15:35:00 2011
EcryptfsInUse: Yes
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)SourcePackage: chmsee
UpgradeStatus: No upgrade log present (probably fresh install)