I am using your deb repository on a Debian 6.0.6 system and just upgraded xpra to v0.8.1. Xvfb got removed, because it was not depended on anymore. xserver-xorg-input-void and xserver-xorg-video-dummy were installed to fulfill dependencies.

Attempting to start xpra:

$ xpra start :999
cannot load vpx codec: /usr/lib/python2.6/dist-packages/xpra/vpx/codec.so: undefined symbol: vpx_codec_enc_config_default
No handlers could be found for logger "xpra.sound.gstreamer_util"
Entering daemon mode; any further errors will be reported to:
  /home/user/.xpra/Squeezy-999.log
$ cat ~/.xpra/Squeezy-999.log
Error starting Xvfb: [Errno 2] No such file or directory
2013-02-05 14:00:13,957 removing socket /home/user/.xpra/Squeezy-999

I installed xvfb manually and now xpra works like it did before, but since the depencies changed, I believe, that´s not the intended behaviour.

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'