I just read about a serious focus issue with the new Hero+.
With the the Hero, Hero2, Hero3 models, you focus is from 2m to infinity, which is nice. The new Hero+ models have their focus from 1-10 meters, which makes them pretty useless for FPV.
More Infos:
http://fpvlab.com/forums/showthread.php?21463-Warning-to-everyone-about-the-new-GoPro-!!&highlight=hero3%2B
http://www.rcgroups.com/forums/showthread.php?t=2011658
http://fpv-treff.de/viewtopic.php?f=24&t=3499