Thank you for your quick response.
However, I discovered that the Recent Comments widget was being used and not the Get Recent Comments widget. The Get Recent Comments widget allows for the teaser.
Thanks, I am the village idiot! I went to mu.wordpress forum and found may answer straight away.
We are new users of WordPress Mu 1.2.1 and the template (Regulus) that our most active blog is using has a problem with the posts_nav_link.
rspas.anu.edu.au/blogs/rmap
The problem is the older posts link at the bottom
doubles the link
http://rspas.anu.edu.au/blogs/rmap/blogs/rmap/page/2/
(ie puts blogs/rmap in twice)
However, once someone is logged in, this is no longer a problem.
I have tried taking similar code from some of the other templates, but it still does the same thing. The templates all purport to be MU templates.
Does anyone have an idea where to look for the cause of the problem?