OS - Win2K, IIS, PHP.
If i use NTFS on my C drive under Win2K, and try to get file over ftp using ftp_get(), ftp_get() fails.
The problem is in C code in php_ftp.c:
C function tmpfile(), that used for creation of temporary files, try to create this file on C:\ (in the root directory, according to C docs):
================ Source code from php_ftp.c ===============
/* get to temporary file, so if there is an error, no  
   existing file gets clobbered
*/                 
   if ((tmpfp = tmpfile()) == NULL) {
           php_error(E_WARNING, "error opening tmpfile");
           RETURN_FALSE;
   }
===========================================================
But, for security reasons, root directory can't be writable by Anonymous user, so ftp_get() fails.
ftp_get() work only if we have c:\ world writable.