Div covering text input in chrome and user cant select it

On one of my web sites there is a text input box on the left for search.

http://wiki.guildwars2community.com/

However in chrome you cant select the input as if you right click>Inspect element it selects a div.

Whats strange is the links and buttons underneath it work fine.

Any ideas or is this a chrome b开发者_如何学编程ug? I have tried setting the z-index to 999 but thats no good.

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Remove the 'display:block;' and it should work..