You should restrict or eliminate the use of action items in Webform Server forms, and ensure that you test all actions thoroughly.
Webform Server instructs the browser to automatically refresh a form whenever user input results in certain changes to the form (for example, layout changes). As a side effect of a refresh, action items that are set to occur once will actually occur each time the form is refreshed. This means that actions may be triggered when you do not want them to be. Furthermore, actions that are set to repeat will not work properly when the form is viewed in Internet Explorer.
As a result, you should restrict or eliminate the use of action items, and ensure that you test all actions thoroughly.
The following action item opens an informational Web page when the form is first opened:
The Web page is intended to provide the user with extra instructions that they should review once before completing the form. However, each time the form is refreshed (either automatically by Webform Server or manually by the user), the action will trigger and load the Web page again. Clearly, this will become an annoyance for users and will prevent them from completing the form quickly and easily.
Exceptions to this practice
Action items are only recommended if you need to trigger some computes off of a page flip.