Description:
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I tried to download file with curl, parse it with external app, show output and kill temp file. But:
1. if php as isapi module - when several requests at one time some inputs are locked! Filemon says that it frees by some cmd.exe after all runned sub-processes already finished. Very strange!
2. if php as fastcgi - it often crashes with error in php_curl (all latest dlls in system32 upgraded; php4ts only in c:\php, php4isapi also in c:\php and no in c:\windows\system)
3. if php as cgi - all OK, except of when user cancelled download the script terminated, but shotdown_procedure not called, so temp files left.

Reproduce code:
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<?ob_start(); $url="http://some.site.com";
  $oinfile = tempnam ("./", "URLIN");
  $infile = preg_replace("#.*[/\\\\](.*?)#","\$1",$oinfile);
  $ooutfile = tempnam ("./", "URLOU");
  $outfile = preg_replace("#.*[/\\\\](.*?)#","\$1",$ooutfile);
  register_shutdown_function(create_function('',
    "@unlink(\"$infile\"); @unlink(\"$outfile\"); @unlink(\"$oinfile\"); @unlink(\"$ooutfile\"); return 1;"));
  $inf = fopen($infile, "w");
  fwrite($inf, "<meta http-equiv=\"Content-Type\" content=\"text/html\">\n");
  $ch = curl_init();
  curl_setopt ($ch, CURLOPT_URL, $url);
  curl_setopt ($ch, CURLOPT_FILE, $inf);
  $st=curl_exec ($ch);
  curl_close ($ch);
  fclose($inf);
  echo `filter.exe $lang $infile $outfile 2>&1`;
  ob_end_flush();
?>

Expected result:
----------------
No .tmp files not in windows\temp\ folder, not in script folder.

Actual result:
--------------
Some .tmp files left and in windows\temp, and in script folder.