Thank you Acorn, your advice solved my problem. For some reason an old version of the nav bar had lodged itself in the layer called mouse down.

As you indicated, I was able to remove the offending items.

Thank you very much gentlemen.

May I ask one other question? Another poster suggested I put the nav bar on to the blog also. I can see that would be a good idea but I didn't realise it could be done. May I ask how this can be done - or if that sounds like me being lazy, on which page of the manual are the instructions please?

Thanks again.