Let me give you a run down on what I am using this for. I have 500+ hotels that I add this to the portal page to each of my server to I can get some information like OS, browsers and hits.
I have about 150 sites setup but now when I try to login and add more I keep getting this error and I can do anything.
#0 Piwik_ErrorHandler(2048, Only variables should be passed by reference, /var/www/analytics/plugins/MultiSites/Controller.php
This will display my arrays in text over the whole screen.
Fatal error: Maximum execution time of 30 seconds exceeded in /var/www/analytics/core/ErrorHandler.php on line 30
I know it is still working because I have the IPhone app & a api running for my customers.
Can you help me?
Marking as a dupe of #1077.
You might get a bit farther with  and increasing the max_execution_time in php.ini.
ed.joseph, were you able to fix the errors increasing the timeout?