Focus: Instant Death/NaN damage, HP, and MP

If your bug isn't directly related to instant monster death, NaN damage (as opposed to a number), and/or NaN HP/MP, do not post here. If it isn't a bug, do not post here. If there will be whining in the post, do not post here.

Clear your cache first. Don't know how? This needs to be read. It'll explain how.

This bug seems to occur at random (and rarely, it seems). If you were able to duplicate it, inclue that in the post. Make sure that anything posted here is NEW, meaning later than the time and date this was posted.

Since people aren't including enough detail, it'll have to be focused. >.> Include the following in your post, based on the problem. Trying multiple weapons in your inventory (if you have them and can log in) is appreciated.

Questions to Answer
1) Class (Warrior, Mage, Rogue)
2) Equipment (List the what the character has equipped - weapons, rings, belts, pets, guests.)
3) Quest (Please describe and use the name from the Quest icon between Inventory and Temp.)'
4) Monster (Pretty simple. Which monster was it? Use the exact name.)
5) Explain what happened BEFORE the bug. (Don't put nothing. Did the character just enter the quest? Recently finish a battle with no problem? Switch inventory items?)
6) Explain what happened DURING the bug. (I suppose that it'll be "The character dealt NaN damage." or something similar. If there's more, include it. A screenshot would be helpful.)
7) Explain what happened AFTER the bug. (Could you still play? Did you get kicked from the game then re-login and play normally?)
If you can think of any detail that would help, please include it.

Do not post anything along the lines of "me too," "same here," etc.