grey bar in full screen

Watching certain videos in full screen is leaving a grey bar across the top of the screen. I've tried connecting my macbook pro to 3 different tvs and get same grey bar.

Using Netflix through Chrome; I've tried putting Chrome into full screen and then pressing full screen on the Netflix player. Leaves a grey bar. Leaving Chrome in standard screen and then pressing full screen on Netflix player leaves a grey bar. Kind of where the menu bar would be.

Watching certain other online streaming is fine. Use a website with flash based player which enters full screen perfectly well and covers the whole screen, leaving no menu bar or grey bar.

Using VLC player, it occasionally covers the whole screen but more often than not leaves grey bar across top of the page. Tried checking and unchecking 'Use the native fullscreen mode on OS X Lion'. This doesn't seem to make much difference. Still variable as to whether the grey bar is across the top of the screen when entering full screen.

Any ideas? Anyone having similar issue? Only since upgrading to Mavericks with the new menu bar system. I like having individual desktops when on dual display so don't really want to lose that feature. Only experienced it through Chrome and VLC so far, would just like to pinpoint how to make video through the browser and VLC completely full screen.