I don't know if this has been documented yet (4 pages of threads get a bit much to read)
It seems that when you are waiting to regen health and nano and you ALT-TAB the game (minizing it) your health and nano regenerate a lot faster.
I tested it out with one doctor character and in about 10 seconds I gained 4 health normally while sitting. When I ALT-TABed and waited for about 10 seconds before maximizing I found that I had gained 40 health while the game was minimized!
I just tried it 10 mins ago with nano regen and the same thing happends, but not as fast. It took about 29 seconds for 5 nano points to regen normally. After minimizing for 29 seconds I only gained 35 nano points.
I thought it was an exploit, but it seems that it's just my client getting confused. I tried to run nano progs after a supposed "quick nano gain" and it wouldn't let me even though by nano bar had enough points. Also, with the doctor I noticed my health dropped for no reason after the "quick health gain" about 5-10 minutes after I minimized. I guess it synced with the servers after a time.
Not a major problem, but if someone's resting in a mission and goes off to check the web for some info and comes back to find an erroneous full health bar...
Oh well, thought you might like to know.
Skexis