I am pleased to release Nmap 3.75, which contains dozens of
improvements over 3.70. One of the most important is a huge OS
fingerprint database — I finally got off my duff and integrated the
latest submissions you guys have contributed. We’re talking OpenBSD
3.6, WinXP SP2, Windows Longhorn warez, and hundreds more.

I also fixed several errors that could cause the Windows version to
crash, as well as some cross-platform issues. A new –max_scan_delay
parameter is available for optimizing scn time. -T4 and -T5 are
faster now as well.