libgnomeui 2.20.1.1

* Fix crash in thumbnail (Fernando Herrera, Christian Persch)
* Revert change that added new strings [bug #485922] (Vincent Untz)
* Updated translations.
  - Hebrew (Gil Osher)
  - Italian (Francesco Marletta)
  - Spanish (Jorge Gonzalez)
  - Slovenian (Matej Urbančič)