In the php.ini file located in the /usr/local/php/ folder. Try and change this part with this:
output_buffering = Off
; You can redirect all of the output of your scripts to a function. For
; example, if you set output_handler to "mb_output_handler", character
; encoding will be transparently converted to the specified encoding.
; Setting any output handler automatically turns on output buffering.
; Note: People who wrote portable scripts should not depend on this ini
; directive. Instead, explicitly set the output handler using ob_start().
; Using this ini directive may cause problems unless you know what script
; is doing.
; Note: You cannot use both "mb_output_handler" with "ob_iconv_handler"
; and you cannot use both "ob_gzhandler" and "zlib.output_compression".
;output_handler =
; Transparent output compression using the zlib library
; Valid values for this option are 'off', 'on', or a specific buffer size
; to be used for compression (default is 4KB)
; Note: Resulting chunk size may vary due to nature of compression. PHP
; outputs chunks that are few handreds bytes each as a result of compression.
; If you want larger chunk size for better performence, enable output_buffering
; also.
; Note: output_handler must be empty if this is set 'On' !!!!
; Instead you must use zlib.output_handler.
zlib.output_compression = Off
This is just a test, never used that software but lets see if this will fix the problem. Its a fix from next version.