conflict in NGX radio tuning, IvAp and Saitek radio panel

Dear folks at PMDG, fellow Captains! I'd like to report the following: approaching Paris Orly in a descent under IVAO ATC Paris center, entering the airspace of approach control, handoff to freq. 123,875. Tuning in this frequency via the Saitek radio panel, both IVAP and the NGX show a freq. of 123,88!!! A second later, IVAP crashed (running externally). Several attempts in tuning the correct frequency were not successful. Always 123,88!!! I restarted IVAP, got reconnected - same again. I was able to finish the flight by using another frequency (thanks ATC staff in Paris!). Later, I could reproduce this behaviour in different conditions, but always with frequencies ending in *.nn5. It always ended in a crash of the IVAP-software when run externally and in a FSX crash wenn run internally. I have no idea, where the problem is. Could easily be an IVAP or Saitek driver problem as well, but I have not yet observed it in other aircraft (also PMDG's). Maybe this report of a "radio frequency conflict" finds the reason for the one or the other CTD and might be fixed easily (IVAO developers may also think about this). Nice flights with this really great add-on! Stefan Benzinger