>>...I find that when I click page 2 the tabs don't work at all.
>One time I also noticed something strange with clicking on different areas of the page tabs in 3.0. Also, do you have by any chance the code somewhere which can prevent you from moving to page 2? Is it Enabled?

Yes it is enabled. But I notice that some fields in page 1 have field-rule-validation code in order to be correctly insert into the record.
Also, I notice that before I start filling the fields if I choose to begin in page 2 and go to page 1 it all works just fine. Any ideas ???