Preferences->Video, see 'monitor' -- monitor you choice there will be used when you switch to fullscreen. Try it and let me know if it helped you.
For me this will help but not everyone want to use second screen in full screen always
Shortcut in keyboard settings could solve this probem.
Did you use browser in fullscreen and I think, it's may be better, if you make screenshot
Full window but not full screen.
If you couldn't replicate for some reason i can capture video from both screen but I dont know which program will capture from both.
Bars are showed even if I have mouse cursor faraway from second screen (it depends in which part of first screen I have cursor)Addition from 23 December 2013, 01:32:39
You can watch this problem here http://youtu.be/BQUkuvfsk2Y
I try 4 programs but all has limited hight.
Watch my cursor and top bar (bottom bar act the same)