InfoPath form load rules and loading event order

A strange gotcha in InfoPath concerning which event runs first.

• Create an InfoPath form, with a field.
• Create a Form Load rule, that sets this field to 1.
• Add code behind, and create a Form_Loading event, that sets the same field to 2.

In InfoPath rich client form / debugging

• The result number is 2

In InfoPath browser form

• The result number is 1

Keep this order in mind if you use both Form Load rules as well as Form_Loading event.