You need to renew your winswitch.org SSL certificate. It's causing the default YUM repo configuration to fail.

When I install winswitch on Centos 6.4, I get the following error. Installation went fine, no issues. (Windows version worked fine too, no issues.) I'm assuming it needs something similar to the following added:

        try:
            glib.threads_init()
        except AttributeError:
            #old versions of glib may not have this method
            pass
        try:
            gobject.threads_init()
        except AttributeError:
            #old versions of gobject may not have this method
            pass

Here is the actual error message I'm getting:

$ winswitch_server
[DD] 2013/13/03 16:34:58.449676 main_loop.loop_init(False)
Traceback (most recent call last):
  File "/usr/bin/winswitch_server", line 5, in <module>
    server_wrapper.main()
  File "/usr/lib/python2.6/site-packages/winswitch/server/server_wrapper.py", line 50, in main
    from winswitch.server.controller import WinSwitchServer
  File "/usr/lib/python2.6/site-packages/winswitch/server/controller.py", line 20, in <module>
    reactor = loop_init(False)
  File "/usr/lib/python2.6/site-packages/winswitch/util/main_loop.py", line 21, in loop_init
    glib.threads_init()
AttributeError: 'module' object has no attribute 'threads_init'

​http://sources.gentoo.org/cgi-bin/viewvc.cgi/gentoo-x86/x11-misc/winswitch/files/winswitch-0.12.18-PIL.patch?revision=1.1&view=markup

Gentoo bug report ​https://bugs.gentoo.org/show_bug.cgi?id=471564