Spell checker does not recognize words correctly

If I'm not mistaken, Sublime Text uses hunspell dictionaries for its spell checking mechanism. hunspell is also used in LibreOffice and can be used in Vim as well.

Unfortunately, Sublime Text marks words as incorrectly spelled although they're definitely correct. As a result, almost haft of my document is underlined in red. 

I'm using hunspell-de-de (German dictionary) on Ubuntu 12.10, which is identical with the dictionary in the github repository.

As a verification, I opened my document in LibreOffice, Vim and hunspell's interactive console and everything was fine.

Could you please look into that. Right now, the spell checking mechanism seems completely useless.