PHP seems to be adding quotes after "=" (equal signs) when putting a binary file through to the browser via readfile().

A snippet of the code doing this:

                // Send the file.  Note that PHP automatically sends the
                // private cache directives as this is part of a session.
                $size = filesize("$xferdir->path/$dload");
                header("Content-Type: $type");
                header("Content-Length: $size");
                // detect any gzip'd files and set the content encoding
                // header accordingly
                if (preg_match('/\.gz$/', $file))
                        header ("Content-Encoding: gzip");
                // disable magic quotes so they don't interfere with the 
                // file being sent.
//              if (get_magic_quotes_runtime())
                        set_magic_quotes_runtime(0);
                // dump the file to the browser
                if (readfile("$xferdir->path/$dload") == $size) {
                        // if the file is fully downloaded
                        // add a line to the sslxfer log
                        log_xfer("$xferdir->path/$dload", "down");
                }

The script is called as "dload.php/<filename>" and then sends the given file to the user.  I'll check with our legal dept (blech) on Monday and see if I can make the original and modified files available.