Thanks again for answering!
So the official release is rubbish? I thought that was supposed to be the holy grail in g300-terms.. Do you know if there are any custom roms stable enough to try? I don't want the hassle of installing something that just 'sort of' works. That being said, my current version has some minor bugs too. Sometimes when viewing web-pages, the screen becomes all scrambled and weird when I flip the phone over to landscape, and the only solution is to flip it back.
Anyway, thank you very much for your replies!