403 Forbidden on php scripts (using mod_fcgi)

[hxbro]

I'm getting 403 forbidden on php scripts (html files are working fine), I'm using mod_fcgi (rather than mod_fastcgi) + suexec

It's working fine for the domain that runs ispcp but not for any other domains, I've compared the config between the two vhosts and they look correct.

Can someone confirm what the permissions and users should be in the following dirs and files:

/var/www/fcgi
/var/www/fcgi/domainname
/var/www/fcgi/domainname/php5
/var/www/fcgi/domainname/php5/php.ini
/var/www/fcgi/domainname/php5-fcgi-starter

/var/www/fcgi/master
/var/www/fcgi/master/php5
/var/www/fcgi/master/php5/php.ini
/var/www/fcgi/master/php5-fcgi-starter

I'm not seeing any reference to the 403 forbidden in the logs either, so if anyone knows where that might get logged it might help work out what the problem is!