I've noticed that the space bar on Chrome PL does the same thing as the attack button with one exception. If you are close enough to an item you can "examine", like a sign, then pressing the space bar brings up the box with the item's description. This is a really annoying behavior when trying to target a mob when standing too close to signs. (The Humania signs to the "property manager" are a good example of the problem.) These items really should be examined only by clicking directly on them with the mouse. As it is now, you can be trying to attack and instead get a big text box in your face covering up the whole screen in mid-battle.