the same every time i run it.
i have a slightly more recent OS X install than the other poster.
i also got an error on test 100 the first time i ran it, but that was before
i installed the latest openssl and stunnel which i put in just to get more
of the tests to run, i never use stunnel. never saw the error on test 100
again.

[localhost:blakegir/curl-7.9.5-pre4/tests] root# ./runtests.pl 4
********* System characteristics ********
* curl 7.9.5-pre4 (powerpc-apple-darwin5.2)
* libcurl 7.9.5-pre4 (OpenSSL 0.9.6c)
* Host: localhost
* System: Darwin localhost 5.2 Darwin Kernel Version 5.2: Fri Dec 7
21:39:35 PST 2001; root:xnu/xnu-201.14.obj~1/RELEASE_PPC Power
Macintosh powerpc
* Memory debugging: OFF
* HTTPS server: ON
* FTPS server: ON
* libcurl SSL: ON
*****************************************
*** cURL test suite HTTP server/0.1 listening on port 8999 ***
------------------
test 4...[Replaced internal and added custom HTTP headers]
0a1,6
> HTTP/1.1 200 OK
> Date: Thu, 09 Nov 2010 14:49:00 GMT
> Server: test-server/fake
> Content-Type: text/html
> Funny-head: yesyes
>
  data FAILED

  - abort tests
0 tests out of 1 reported OK: 0%
These test cases failed: 4
------------------

test 15...[--write-out test]
curl returned 6, 0 was expected
  error FAILED

  - abort tests
0 tests out of 1 reported OK: 0%
These test cases failed: 15
------------------

test 120...[ftp download with post-quote delete operation]
curl returned 6, 0 was expected
  error FAILED

  - abort tests
0 tests out of 1 reported OK: 0%
These test cases failed: 120
------------------

test 121...[ftp download with post- and pre-transfer delete operations]
curl returned 6, 0 was expected
  error FAILED

  - abort tests
0 tests out of 1 reported OK: 0%
These test cases failed: 121
------------------
Received on 2002-02-28