Many of the "function" keys at the top work as they are displayed. Brightness, however, does not. Anyone else having this difficulty? Also, do the "F" keys work at all? If so, how to access them? I use them quite a bit on my laptop. This Surface Pro 2 is 2 days new to me, and I have had a few hiccups and glitches. I had some higher expectations from MS with software / hardware inter-operability as this is their device. Still, it will likely be more useful to me than an iPad or Android tablet might. Thanks!