gnome-tweak-tool crashed with KeyError in _got_info(): 'version'

using gnome 3.10 from ppa give this on start of gnome.tweak.tool.
it looks a bit funny, but works, And look can come from bug in theme.

ProblemType: Crash
DistroRelease: Ubuntu 13.10
Package: gnome-tweak-tool 3.10.1-0ubuntu1~saucy1 [origin: LP-PPA-gnome3-team-gnome3-staging]
ProcVersionSignature: Ubuntu 3.11.0-13.20-generic 3.11.6
Uname: Linux 3.11.0-13-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.12.5-0ubuntu2.1
Architecture: amd64
CrashCounter: 1
Date: Sun Nov 24 01:22:05 2013
ExecutablePath: /usr/bin/gnome-tweak-tool
InstallationDate: Installed on 2011-09-19 (796 days ago)
InstallationMedia: Ubuntu 11.10 "Oneiric Ocelot" - Beta amd64 (20110901)
InterpreterPath: /usr/bin/python2.7
MarkForUpload: True
PackageArchitecture: all
ProcCmdline: /usr/bin/python /usr/bin/gnome-tweak-tool
PythonArgs: ['/usr/bin/gnome-tweak-tool']
SourcePackage: gnome-tweak-tool
Title: gnome-tweak-tool crashed with KeyError in _got_info(): 'version'
Traceback:
 Traceback (most recent call last):
   File "/usr/lib/python2.7/dist-packages/gtweak/tweaks/tweak_group_shell_extensions.py", line 327, in _got_info
     uuid,version,extension["version"]))
 KeyError: 'version'
UpgradeStatus: Upgraded to saucy on 2013-10-20 (34 days ago)
UserGroups: adm admin cdrom dialout fuse libvirtd lpadmin sambashare wireshark