We are in the process of setting up a My Site deployment. We are
testing this in our UAT test environment Whenever we try to search
from the My Site area, we get the following errors:

Object reference not set to an instance of an object. at
Microsoft.Office.Server.Search.WebControls.CoreResultsWebPart.OnLoad
(EventArgs e)
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Control.LoadRecursive()
at System.Web.UI.Page.ProcessRequestMain(Boolean
includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint)

----
I also note that the URL for the search changes to the server name
when searching from the My Site. However, this doesn't happen when
searching from the non-My Site site collection. Search works fine
from there.

Any ideas?