Freshadow, it heals you from whatever negative hp value you had after being hit to positive 75. With 84 you might've been hit for 20 damage at 11 hp, resulting in -9 health. You then get healed for 84 health to bring your hp up to positive 75.
Co op missions update and delete themselves at 12 midnight, GMT; as well as the item shop. Extermination missions update at 12, west coast time. Shouldn't it be uniform?
Your save file does randomly corrupt... It isn't just "your computer". For some reason saves are saved wrong, or some other fatal error Nabb created and forgot to fix. It isn't the user's fault.
Guarding would break elements of the game. Each class is designed to fight in only one way. If you find the need for a "guard" type ability too strong, simply switch classes. As I said, though, guard will not/should not be implemented =/ A dodge feature is already in place... albeit broken.
Super, just a few notes on your comment.
About the multiple pages, yes that is only temporary. The drop rate for food will be drastically dropped once the actual item shop is added. And we will probably be seeing an ever better condensing of the item menu (We already petitioned for the ability to see health in the item area, and also to use multiple items without the menu automatically closing).
Secondly, the bug where you can shoot things off screen as an aeronaut will (Hopefully) be fixed soon. Nothing much I can say on that though!