jqGrid Edit Form Dialog Modal Background Moves Rest Of The Page
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I am using jqGrid 1.7.3. For manipulating rows I use jqGrid's form editing capabilities (modal dialog). Everything works fine in Firefox and Chrome, but if it comes to Internet Explorer ... well what shall I say. 

Actually the edit window shows up fine but the background behind the dialog is not positioned over the rest of the page but moves eveything down!

i actually changed the css for that but nothing happens. So it seems the background gets its css info by jqgrid and not by any css decleration. 

has anybody a clue how to set the css right ? 

thanks in advance