I believe this is a configuration problem resulting from a "problematic"
upgrade from 13.04 to 13.10, because:
* only one of my computers is affected by this bug.
* the affected computer had three languages installed: English, Spanish
and Polish. Although, after the "problematic" upgrade, the language
indicator was still showing all the three languages as options, Spanish
and Polish were missing in the System Settings.
I have solved this problem in my desktop by installing the Spanish and
Polish language packages again:
1) System Settings > Language Support
2) Language > Install/Remove Languages
3) Tick all the languages listed in the language indicator
I believe this is a configuration problem resulting from a "problematic"
upgrade from 13.04 to 13.10, because:
* only one of my computers is affected by this bug.
* the affected computer had three languages installed: English, Spanish
and Polish. Although, after the "problematic" upgrade, the language
indicator was still showing all the three languages as options, Spanish
and Polish were missing in the System Settings.
I have solved this problem in my desktop by installing the Spanish and
Polish language packages again:
1) System Settings > Language Support
2) Language > Install/Remove Languages
3) Tick all the languages listed in the language indicator