What should I do if I get unrecoverable error when starting Facebook client?

Remove and reinstall Facebook application:

  • Select Menu > Settings > Application mgr. > Installed apps. and uninstall the following applications (if found):
    • Facebook Installer
    • APIBridge
    • Facebook
  • Install Facebook again via Menu > Applications > SW Update.

The error can occur if Facebook application has been updated via SW Update menu and backup - restore has been done after that.