by Roger Mepham.
Hi I have the same problem that Moodle 2.5 gives the error cannot create local pool file. my host Tsohost.co.uk come back with the same theory somehow not writing to the folder.
This is on the cloud server option Tsohost with a manual 2.5 install. Oddly enough on the cpanel hosting they offer the auto install of moodle 2.5 works fine.