You can get this error if You are uploading file via post parameters, and it’s bigger than allowed size.
[warn] [client 184.108.40.206] mod_fcgid: stderr: PHP Warning: POST Content-Length of 12430806 bytes exceeds the limit of 10485760 bytes in Unknown on line 0, referer: http://www.yoursite.tld/index.php?phpparams
In php.ini file You should set bigger limits.
post_max_size = 32M upload_max_filesize = 32M
and reload apache
service httpd reload