Yes, did that 3 days ago. But I have been doing some more "playing". I may be premature in saying this, but it looks like it could be Cubase where the problems lies.

If I start a new project and simply import both MIDI and WAV from a saved RB or BB file I get the odd lengths, but, if I start a project and import just the MIDI files first, AND, except the offer to "make a new project", the MIDI comes in, at the correct length, and, when I then import the WAV files they also match up to the correct length.

So, in conclusion, and as a work-around, it looks like I have just learnt a valuable leason.

Still don't know why it happens, but I hope this little experience may help others.

many thanks Guy's for all your help, much appriciated.