Hi after I upgrade to Firefox 3.6 , the combo is not working anymore (click anything in dropdownlayout doesn't work). The samples  is not working too http://samples.infragistics.com/2008.3/WebFeatureBrowser/WebGrid/WebCombo/WebCombo.aspx 

The error console shows javascript error : Error: document.getBoxObjectFor is not a function

Thanks.

Edit: http://blogs.infragistics.com/forums/p/36753/217075.aspx after search at  WebGrid box , I found this thread. And thanks to their solutions.