The source is here. On Solaris I tend to build from source using gcc and install into a different path (/opt/OurApplicationName/perl) so as to leave the existing Sun build of Perl (which seems to get used by the volume manager of choice, as well as a couple of other things) intact, and to resolve the issue you are having. It should be noted that I do this to avoid issues (including political ones) with the Client we work for. Remember to read the INSTALL and README.solaris files carefully.

Update: I forgot to mention, IO::Socket built without any problems using the method described above.

Hope this helps.

Martin