Have installed 2.0.18.1 from scratch and am getting a blank error 500 page from time to time with the corresponding error appearing in the logs..

[Fri Mar 7 10:31:36 2008] [error] [client xx.xx.xx.xx] FastCGI: comm with (dynamic) server "/var/www/fcgi/php-cgi" aborted: (first read) idle timeout (30 sec)[Fri Mar 7 10:31:36 2008] [error] [client xx.xx.xx.xx] FastCGI: incomplete headers (0 bytes) received from server "/var/www/fcgi/php-cgi"

any ideas anyone?

what do you use the php-cgi folder for? check for missing file or something like that

and make sure you have uploaded all your XOOPS files