It appears that ScrollTop property is always reset to 0 if the person using the portal is using a non admin or non host account on DotNetNuke 4.3.5.

Can some please help? It works fine on 04.03.04

Hi Jon, I believe I isolated the problem but I don't know how to solve it. So here it is.

1) Please create a blank module and add a command button or a checkbox that has postback enable.
2) Created a blank page that is visible to all Users and only add this module to that page .
3) Go into this module properties, and set them up as follows. 
         a) Set visibility to [None]
         b) Make sure  Display Container is [Unchecked]

4) With admin account check or uncheck, or hit the command on the page. Result= The page will scroll to the previous location.
5) Logoff and run the same test. Result = The page will scroll to the top. It appears as if the ScrollToTop value is reset.

You may go this site and click on [Go by the Search TextBox]
http://www.dotnetnuke.com/Community/DotNetNukeCommunityModulesV34/tabid/794/Default.aspx

Now the reason the login module still works if setup as previously describe is because of the piece of code in it
SetFormFocus(txtPassword) and  SetFormFocus(txtUsername)

SAMPLE MODULE TO USE