BuddyPress.org

I believe I have done what you have suggested and changed the permalinks settings. An example post did read:
http://www.warchest.co.uk/blog/index.php/2010/09/how-to-paint-miniatures/

Now reads:
http://www.warchest.co.uk/blog/?p=80
I take it that proves the .htaccess file is updating?

The reason for my confusion regards missing files is that selecting “Account’ for example looks for ‘http://www.warchest.co.uk/blog/members/admin/’ where ‘/members/admin/” does not exist on the server. All files excepting those cited previously are in the buddypress plugins folder.

Apologies if my lack of knowledge in this area is throwing a curve ball.

I am using the default buddypress theme.