Monsters who took damage from dash attacks and acid weapons would get confused and try to attack the acid (the thing that was hurting them) rather than the player. This caused all sorts of problems, including making monsters invulnerable, making them run away from you (trying to find the acid!) and making quest completes fail.
I've turned off the elemental effects for weapons for now. I'm probably going to redo them sometime soon. Took me all night to find this one and I want to thank those that posted the bug and sent the log files!
This update also includes a change to the Grrrumble quest. The quest is no longer rare and should appear as a normal Story Quest once you have a Stonemason.
Grrrumble is also sporting the new Copper Ram Helmet. Sorry, he gets it before you do. Look at him...he's a huge Earth Elemental, how am I supposed to tell him "no"?! :)

Also fixed a typo on the description for the Fishing Pier that said you could only have three. You can have four.
Changed files in this update