emerald Invalid utf-8 string

Binary package hint: emerald

I use Compiz-fusion at ATI Radeion IGP 350 (xserver-video-ati) in Gutsy Gibbon Tribe 5.
Sometimes after starting I can see this bugs in .xsession-errors log:

(emerald:6333): Pango-WARNING **: Invalid UTF-8 string passed to pango_layout_set_text()
...
...
...
(many times)

During this messages in log I lose some titles on some windows.
And after that all windows lose their decoration at all and I can see these messages in .xsession-errors.log:

(emerald:5333): GLib-GObject-WARNING **: invalid uninstantiatable type `-g-type-private--GTypeFlags' in cast to `GdkDrawable'
(emerald:5333): Gdk-CRITICAL **: gdk_cairo_create: assertion `GDK_IS_DRAWABLE (drawable)' failed
Cutting log (size: 100990, max: 100000

I start GL Desktop again - and it all works again right.
Is it big problem? Or can I fix it by my hands?

ProblemType: Bug
Architecture: i386
Date: Wed Oct 3 01:10:01 2007
DistroRelease: Ubuntu 7.10
ExecutablePath: /usr/bin/nautilus
Package: nautilus 1:2.20.0-0ubuntu1
PackageArchitecture: i386
ProcCmdline: nautilus --no-default-window --sm-client-id default2
ProcCwd: /home/worker
ProcEnviron:
 PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games
 LANG=ru_RU.UTF-8
 SHELL=/bin/bash
SourcePackage: nautilus
Uname: Linux alex 2.6.22-10-generic #1 SMP Wed Aug 22 08:11:52 GMT 2007 i686 GNU/Linux