There are two different forms to display views in MS CRM 4. One for activities' views and the other one to dispaly other entities' views.
I used to use following code to generate url for addressable form to display particular view:
Recently I found that homepage.aspx incorectly displays activities' views. Columns From and To were empty:
The right way is to use home_activities.aspx if you want to display activities' views. The code was changed to:
home_activities.aspx displays activities as shown here:
You can read more about addressable forms here: http://msdn.microsoft.com/en-us/library/cc150850.aspx