I had a site whivh i had done using extensions in salled seperatly
i needed to change the email to use pear as the email adress required authentication.
there was a problem with having both email php and pear includes on the page
was saying that it could not redeclare the functions.
i had edited he files to use a if (!function_exists('funcname')){ wrapper.
i think i must have inadvertantly messed some thing up, i deleted the 2 pear and php includes.
readded the email and then re-uploaded the 2 includes.
which fixed the problem.