I don't know if it was the most recent patch, but it seems I'm experiencing more bugs than usual. Though some have definitely been happening before patch C.

-inability to switch to a weapon with no ammo (in order to swap it with another).
-out of ammo reload loop. I ran out of ammo, but then showed some ammo in reserve (I may have picked up some ammo), however, trying to reload the weapon played the animation but failed otherwise.
-inability to use kill-streak. The notice would flash that I had a kill-streak available but would not execute, even after picking up enough tags for another kill-streak. This persisted through deaths.

I had a bug that didn't allow me to use the mouse i.e I could only walk forwards,backwards and sideways, but couldn't move the mouse at all. I had to melee to fix it.

Had a bug where I could not throw a grenade....