This is a strange problem because I have loaded libraries and things with the 'Paths' dialog under the file menu before and had no problems.
I am trying to get Chris McCormick's s-abstractions to load. The folder is in the same folder as my other libraries and it is listed in both the "paths" and "startup" areas. It wasn't before but I added it.
I am running windows 7 64 bit. Another oddity that I noticed is that in my Program Files (x86) which is where the 64 bit programs live, I have pd installed and the folder is simply called pd. However in the Program Files folder (missing the x86, where the non-64 bit programs live) I have a folder called "Pd-0.42.5-extended"
I wonder if that couldn't be the problem. The s-abstractions folder is included in both though...
Hopefully somebody has some idea about this...