1) The issue where I had to enter my multiplayer key every time I wanted to play multiplayer. I fixed if with the fix linked to on the first page.

2) When replaying levels after having completed the game, at the start I have access to all attachments I have found. After a death, I typically no longer have access to any attachments but may recollect them.

3) There seems to be a graphics glitch with seeing others cloak. In the campaign and online, when others cloak, they momentarily seem to have an all-black texture.

4) General AI glitches such as: becoming stuck on each other/objects, not noticing bodies next to them (in the office ambush, I hid in behind them before they came in, shot one in the head with a silenced pistol, and they commented, "Guess there's nothing here.")

5) A particularly frightening tendency of enemies esp. the pinger and cloaking Ceph soldiers to track you even when cloaked or out of view on Post-Human Warrior difficulty.

6) Commonly the game will not allow me to melee enemies in singleplayer and pressing 'V' produces no effect at all.

My system's possibly relevant specs: Core i5, 6GB RAM, MSI Cyclone GeForce GTX 460

Generally I was playing on Post-Human Warrior difficulty (I like my Crysis with a feeling of being hunted and outgunned; it gives it a bit of a Rambo feel) and Extreme graphics settings.

I'll add more as I notice or remember them. Thanks for an awesome and beautiful game. I was worried the change from the openness of Crysis 1 would upset me but the "action bubbles" work wonderfully.

My father and I are having some issues with losing the ability to melee, stealth kill, and change our weapon's selector switch setting seemingly at random. So far the only way we've been able to address it, is by completely exiting the game back to the desktop and then restarting it... which only temporarily fixes the problem as it happens again sooner or later.

You can imagine the frustration when getting killed in single player, or worse, online against other players, over and over because these simple actions won't f***'n work! We have no idea what causes it, but it's extremely aggravating. Anyone else having these problems?

I've also been having the same problems on the Xbox 360 version (I play both). However, it only happens a fraction of the time the PC version does. Never the less, it's a very irritating problem and one that shouldn't exist in the first place. Please help!