Unexpected Character Input Error When Running Php4 And Php5 Together

CentOS - I had php4 running and php5 as cgi but then decided I wanted to have it the other way around i.e. run php5 standard and php4 as cgi.

php5 is now running fine but php4 bombed with this error:

Code:
Unexpected character in input: '?' (ASCII=15) state=1 in /usr/local/cpanel/cgi-sys/php4
I fixed it by doing the following:

EDIT php.ini file:
Normally in /usr/local/php4/lib/php.ini

Under
;;;;;;;;;;;;;;;;;;;;;;;;;
; Paths and Directories ;
;;;;;;;;;;;;;;;;;;;;;;;;;

UNCOMMENT this line

Code:
;cgi.fix_pathinfo=0
(i.e. remove the ";" infront)

and
CHANGE 0 to 1:

Code:
cgi.fix_pathinfo=1
This is for Linux and must be done with root via SSH

Not sure if this will help anyone, but I thought I'd post it anyway.