Well, I'm asking in my wehost support forums too...cos things were working fine till recently...I obviously was able to intall both 2.5 and 2.6 from fresh install in the past with no issues upgrading from 2.5 to 2.6 either...this is a recent phenomena which I'm investigating. Appears to be a host issue, but want to confirm...Admin? This IS host related, it is not?