Comment 2 for bug 576638

I can confirm this bug on Ubuntu 11.10 with gnome-dictionary 3.1.2.

1. Install gnome-dictionary (it is no longer included by default)
2. Edit>Preferences. Select "Spanish dictionaries." Close the Preferences window.
3. Enter a word in the Lookup field.
4. After taking a moment, gnome-dictionary shows this error message:

Error while retrieving the definition
Lookup failed for host 'es.dict.org': Unknown error