The release of Rubygems 0.9.2 (and possibly earlier) introduced an incompatibility with the patch supplied with RubySSPI. The newest releases fixes that incompatibility. It does, however, introduce new class and module names and is not backwards compatible with previous versions of the library. If any code has been developed against the gem, be careful when upgrading.

RubySSPI is a library which implements native NTLM authentication on Win32 for Net::HTTP against NTLM-authenticating proxy servers.