Control focus on autopostback in UpdatePanel

I have an Update Panel with a bunch of textboxes, and have code for the _onTextChanged events of some of them, so I have enabled AutoPostBack=true.
This is a data entry screen, so the TabIndex is critical. In Mozilla, when the textbox posts back, the TabIndex moves to the next box as expected. In IE, the reload of the page seems to reset the TabIndex to the first textbox.

Any ideas on how I can make my code behave in IE like it does in Mozilla?

ThanksActually, I asked same question yesterday. Unfortunately, no answers yet.
You could use Control.Focus(), to manually set the focus to the next control (either in the server code or with javascript).
That's the strange thing about it... I already had that, and I watch it work in stepping through the _onTextChanged of the control, but then the focus just gets changed/set to nothing after my code set it properly...