In my source I like to group my imports in packages like 
this:
  import java.util.Enumeration;
  import java.rmi.RemoteException;
  import javax.servlet.http.*;

  import org.apache.log4j.Category;
  import org.apache.struts.action.*;

But if I let the import management tool remove unused 
imports etc. (do it's thing) it removes my order/grouping 
of imports and it will look something like this:
  import org.apache.log4j.Category;
  import java.util.Enumeration;
  import org.apache.struts.action.*;
  import java.rmi.RemoteException;
  import javax.servlet.http.*;

It is not so serious if there are 2 or 3 imports but you 
lose quick insight over which packages you are importing 
if the number goes above 10 or so imports.
Suggestion: leave alone current ordering of import 
statements or better, give the user a sorting option 
(including whitelines between package groups possiblity)