The way the PHP page is generated (buffered or not, and how if buffered) has an impact of the download function made using fpassthru (or fread, ...). I mean a download function may work just fine when it is called from a simple php file (no buffering here):
<?php
function download($file) { ... }
$filename = "/tmp/test.zip";
download($filename);
?>
but may fails "in the real life" when the page is buffered:
<?php
ob_start("ob_gzhandler");
...
require_once(download.php);
...
$filename = "/files/file.zip";
download($filename);
?>
In my particular case, only Firefox 1.0 English did not perform the download, because of the ob_start("ob_gzhandler"). Replacing it by ob_start() solved the problem.
Hope that helps
Laurent from Paris, France
