OK, I am stoopid, but the people who write the error messages at Nokia are not much better. The error message I got when trying to install the N95 plugin was

"You must upgrade to the latest iSync to install this plugin"

when it should have read

"Dork! Put the iSync app back into the main Applications folder to install this plugin"

.Duh !

Magic of the boards...

Anyway now the synchronization with brain-damaged iCal and Mac Address Book work beautifully - handy when I need a number and Notes is not open; it does not seem to recognize precisely the data label though, so all mobile phones are labeled "Other"; ditto or email - I am just worried this might propagate back to Notes and I just HATE untidy address books...