Ken,
Did you check that drivers 10.6.7 support your mouse ? *** SpaceExplorer is not listed ***
If you search for older products it suggests you should use version 10.4.3
10.6.7 is working okay for me in CamBam and Rhino.
As far as the CamBam plugin is concerned there are no differences between all versions, it's just that when 3DConnexion bring out a new driver I have to recompile the plugin with their updated software otherwise the plugin won't load.
Versions 10.6.6 (that was quickly withdrawn by 3DConnexion) and 10.6.7 were the first versions where the old driver had to be uninstalled first by the user, so that might hold a clue to a new problem.