Problems with output buffering and gzcompress()

heres whats not working, I can get php to compress my output buffer but I cant get my function to work in all browsers. //-------------------------------------------------------------------------- --------- header("Content-Encoding: gzip"); ob_start("compress_output"); //-------------------------------------------------------------------------- --------- echo "hello? what? why do you say it like that?<br>\n"; ok there is the code Opera 5.01 - displays page ok, but gives a "data corrupt error" IE 5.5 - displays blank page Lynx 2.8.3 - everything works Amaya 4.2.1 - everything works Netscape 6 - everything works //-------------------------------------------------------------------------- --------- function compress_output($output) { $output = gzcompress($output); $size = strlen($output); $crc = crc32($output); $output = substr($output, 0, strlen($output) - 4); $data = "\x1f\x8b\x08\x00\x00\x00\x00\x00"; $data .= $output; $data .= pack("V",$crc); $data .= pack("V",$size); return $data; } //-------------------------------------------------------------------------- --------- Opera 5.01 - GPF's IE 5.5 - everything works Lynx 2.8.3 - everything works Amaya 4.2.1 - everything works Netscape 6 - everything works //-------------------------------------------------------------------------- --------- function compress_output($output) { $output = gzcompress($output); $size = strlen($output); $crc = crc32($output); $data = "\x1f\x8b\x08\x00\x00\x00\x00\x00"; $data .= $output; return $data; } //-------------------------------------------------------------------------- --------- Any idea's ? With one IE doesnt work, with the other Opera doesnt work. And all you who say "no one uses Opera" dont bother saying it. :) Chris Lee Mediawaveonline.com