Dialog init shows on page

Dialog init shows on page

sing jQuery UI 1.10.2 with AngularJS and Chrome Version 32.0.1700.76 m

I have a simple index page that inits a dialog with autoOpen: false,

 $( "#myDialog" )
        .dialog({
           autoOpen: false,
......etc 

On page load/refresh, I see elements of the dialog appearing at top left of page for a few seconds,
looks almost like an unbound version of all dialog contents, rather than constrained by the size of the dialog.

I do not want to see this dialog appear, until I specifically open() it.

Any ideas?

Phil