So I have an Apple Wireless Keyboard that I bought used on Kijiji about a month ago. It's the latest model as the function keys match my 2011 MBP. I love it overall but most of the function keys don't work. The only ones that do are the volume buttons but even they sometimes don't work. The delete will often stop working and sometimes the volume keys will become expose and dashboard keys. I've only gotten the audio keys to work as intended once. Anyone else having these issues or know a solution?