$.dialog positioning problems with Webkit browsers

$.dialog positioning problems with Webkit browsers

When using $.dialog() in Chrome/Safari. The option position: "center" only aligns the dialog box to the left center.

Again, this is Webkit only. FF3/4, Opera, and IE(sad IE works over Chrome...) all position properly.
I did notice though, cause I have another project thats currently using jQuery UI 1.8.7 is working fine. But the bug is in 1.8.9.

Heres a JSFiddle test case. http://jsfiddle.net/samishii23/MW53R/4/