[bug] Iron pick axe durability decreases by several points each use

Summary: When equipped with an Iron Pick Axe, trying to mine once decreases the Iron Pick Axe durability by several points.

Remarks:

• This happens on both Sandstone and Rock.
• It seems as if the item is used several times: more items are picked up, several messages are displayed (including warning such as “You are carrying too much weight!” and “An Iron Pick Axe is in need of repair.”).
• I have not payed attention to Stamina consumption.
• I think I have observed a similar behaviour with other semi-advanced items such as a Wrought Iron Pick Axe or a Wrought Iron Double Axe, but didn’t pay much attention.
• This can lead to the item being destroyed without the messages advertising the need of repair.

Reproductibilty: Apparently systematic, but I only tested with a single Iron Pick Axe.

Context: Safari 5.1.9 with several extensions and plugins, running on Mac OS X 10.6.8.

Steps to reproduce:

1. Craft an Iron Pick Axe
2. Equip the Iron Pick Axe
3. Move your character until it faces a grey Rock tile using the arrow keys
4. Press the arrow key in the direction of the rock

Expected results:

• The item durability decreases by one.
• You gather from zero to several items you may find in grey Rock tiles.
• Messages are displayed accordingly

Actual results:

• The item durability decreases by a number up to at least 4
• You gather several (usually) items you may find in grey Rocks. It is possible to gather identical items several times: several sets of Stons, e.g.
• Messages are displayed accordingly