Blog Bug
Hi, I reproduced this error on the Demo site as well as some other v3.0 classipress sites including mine, seems to be a bug.
When a post has been published by an author in the Blog, if you click the author name for example (David Cowgill) you get:
Whoops! Page not found, The page or ad listing you are trying to reach no longer exists or has expired.
Try it, scroll down to the blog and then click on David Cowgill hyperlink.
http://wpclassipress.com/demo
Thanks
tbase