In order to access the page overlay feature we had to enable Piwik to be accessed from oursite.com/piwik/ as well (to avoid problems with accessing a frame which has a different domain), instead of piwik.oursite.com.
However the tracker still makes use of piwik.oursite.com and for some reason when we load the tracker from oursite.com/piwik there are a number of (5 or more) redirects instead of just a single request to piwik.php.
Anyhow what I'm asking is: would it be hard to recognize the tracker as long as it is loaded using any of the accepted domains, instead of just the domain that is used to access Piwik this particular time.
it should work even if the piwik and the site you are viewing overlay for, are not on the same domain. So it should work . please use forums for support!