[jQuery] Possible jQuery 1.4 and jQuery UI 1.7.2 bug

Hi jQuery team,

I think I've found a small bug when using jQuery 1.4 with jQuery UI
1.7.2 in the 'open' event of the dialog widget.

I'm going to try to dig into it this weekend so that I can provide
some better information and maybe even a patch, but until then I
wanted to post it here to get your opinion on it.

Explanation and demo of the bug: http://bit.ly/5Hz2u3

Cheers,

Shaun