Hello @ll,
i`ve the same issue in a InfoPath 2007-Form on a MOSS 2007.
Setting all Controls to 100% or 99% or a fixed width in px doesn`t solve it!
Have anyone tried this in InfoPath 2010 or find another solution in 2007?
Edit:
If you open the mail/formular in outlook, you can click on Actions -> Other Actions -> "View in Browser" to get a *.mht-File shown in your Browser. This view is very fine. Maybe this is an workaround for anyone... i've to look for an solution directly in Outlook!
Edit2:
I created a 2nd view and put all controls in a layout-table with a fixed width and publish the Form with InfoPath 2010.
The same error occured... solution is still needed ;)