the help browser closes when i type something and press "enter button.

this happened after installed win2-7 pack...
i'm using ubuntu i-386 32 bits
when i acess help of ubuntu, it opens but i can't search anything, only brose on his links...when I try to search and press enter it closes....

ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: yelp 3.0.0-0ubuntu2
ProcVersionSignature: Ubuntu 2.6.38-11.50-generic 2.6.38.8
Uname: Linux 2.6.38-11-generic i686
Architecture: i386
Date: Mon Oct 3 09:02:53 2011
ExecutablePath: /usr/bin/yelp
InstallationMedia: WindUbuntu - Release i386
ProcEnviron:
 LANGUAGE=pt_BR:en
 LANG=pt_BR.UTF-8
 SHELL=/bin/bash
SourcePackage: yelp
UpgradeStatus: No upgrade log present (probably fresh install)