Currently because of the way that they are coded the clean site systems links don't always work...

If you are clicking on a www.insanejournal.com page then the links in the Clean scheme will work but if you are clicking from a persons subdomain

then you will get something like:
http://qem-chibati.insanejournal.com/users/qem_chibati/friends

Which doesn't work. ^_^;;

Basically anything described as "my" doesn't work 100% on the clean site scheme and it would be awesome if this is something that could be fixed.