Ric, I have tested the system with the 5.3.24 version and all works according to plan. Is there apc.dll available for 5.3.24 too? I am running Windows 7 pro. I am sorry I did not ask and I had just verified that it is active on the hosted site. If not then no worries I expect no issues but surprises with live sites for admins are not good for the head. My test bed(s) of a Joomla 3.3 system is not having any issues with 5.3.24 (no apc) or 5.3.29 (apc enabled) nor any issues with the 5.4.36 version (apc enabled) The current live system is Joomla 1.5.26. (Linux host) So we are going to be jumping in with both feet shortly. Thanks again