First of all I would like to wish you all a very happy New Year!
In between Christmas and the start of the New Year I installed the final release of Media Portal 1.0.0.0, including the TV Server and the version 1.4.2.2391 of the IR Server suite.
Before installing the new version it is advised to uninstall any previous installations completely, which I did through the Control Panel Add/Remove programs. Unfortunately that did not remove all traces from previous Media Portal installations. After installing/uninstalling Media Portal 1.0.0.0 I went into regedit to remove all registry settings related to MediaPortal, and reinstalled version 1.0.0.0 again. First the good news: The system seems to be working pretty well, including the remote control with IR Server Suite 1.4.2.