How do I report a bug?

While running a certain mission, upon completing its bonus, me and my team were rewarded with.. "305,982,976 experience and 8 skill points."

This is obviously a bug.

But I have no idea how to report it.

Now that I have your attention, how do I report this?

Where's this bug? Because I'd like to complete that mission right now.
http://support.guildwars.com

.. it's fixed!

Iron Mines of Moladune was displaying that.

No longer, though.

Not sure if I actually even earned that much, either. ;P I just know it says I did.

not bad

I'm not sure if this is a bug, but I wasn't targeting anything, so when casting healing breeze, I should heal myself. I wans't hexed as you can see, but still I got this strange notice. I'm sure I didn't target an enemy or ally, since there would have been a health bar in the top middle.

should I report this? or is it something I overlooked?