In the webpage, there is a encoding problem with Finnish symbols ä (?) and ö (?) with popup messages. This was found with testing the voting option in custom user assignments.
See screenshot for more detailed information.
Found on Chrome 21.0.1180.89 m, browser language was English.
Same problem in french
Every language with special characters, like éëáïö, etc. has the problem. It's a common bug in the internet world. Brain will certainly have a solution for this, just be patient. :-)