UI/dialog jump down when dragged in MSIE

[[email protected]…]

when the page is scrolled down and then an ui dialog is being opened, trying to move it will cause it to "jump" down the page.

here's a complete sample (scroll down and click "open"). ​http://jsfiddle.net/77BMY/1/

this bug doesn't not occur in version 1.10.2, and happens for all versions of ie.

thanks, Roey

[Scott González]

Duplicate of #9315.