First, a minor glitch. For some reason when I assign 35 points to HP (which equals a health of 320) the "3" is missing in the health meter. Does this happen to anyone else?

Now the odd glitch. With 320hp I was attacked by a zombie which dropped my health to a flat 300. When this happened, ALL the numbers in my health meter disappeared and my weapons would no longer play any animations or sounds. I could still attack and suffer damage from zombies, but the health meter wouldn't change and my weapons were still inactive. I managed to fix the problem by getting a medkit and restoring my health, which re-displayed my health meter and re-activated my weapon animations and sounds. I've only had this happen once, but I will try to reproduce the error in case it was just a fluke.