Description of problem:
When doing a Yum upgrade from F11 to F12, the tigervnc packages are not replaced. tigervnc-server needs to be completely removed first to allow libcrypto and libssl to be upgraded.
After the upgrade I'm left with:
tigervnc.i586 1.0.0-2.fc11 @updates
tigervnc-server-module.i586 1.0.0-2.fc11 @updates
tigervnc.i686 1.0.0-1.fc12 fedora
tigervnc-server.i686 1.0.0-1.fc12 fedora
tigervnc-server-module.i686 1.0.0-1.fc12 fedora
It's possible to install the tigervnc-server package from F12 at this point, but it's not easy to get tigervnc and tigervnc-server-module in sync. I needed to manually remove and reinstall them as well.