I've ran into this prob with some past pages - where the form is submitted
when hitting the enter  key from within a text  field & the form auto-posts.
If you're not enabling viewstate on the page  - or on the elements you want
displayed - then they will show up after that post. If you don't want to
use viewstate, then you'll have to reload your elements manually. I
haven't found a way of disabling that post event -- perhaps a javascript
function call could help  - but i belive it's IE's behavior to do this...