Don't know if it's a bug or a feature :)
Worked with pathauto on every page I did until know but in my actual project which is a multilanguage site it seems that pathauto is not able to handle two languages.
I am running german(default) and english. Once I am adding new content in german it generates a path like http://example.com/de/content/mycontent but I get a page not found when entering the path into the addressbar and all links to that content appears like http://example.com/node/6.
If I choose english it works.
If I delete english it works fine for german and the problem disapears. Only if I am running both languages at the same time, one language get screwed up.
Now I am testing adding an additional third language... stay tuned