For some reason I never received the email of your original bug report! It is in the mailing list archive though (https://mail.gna.org/public/relax-devel/2006-10/threads.html). Maybe it was because I was changing the 'Category' field value for the bug tracker at the same time you submitted the report? Did anyone else receive that message?
It definitely is a typo. If you have a look at the file 'maths_fns/ri_comps.py' you can see the correct equations there. That's lucky! Alex, this file is probably where most of the changes for the asymmetric CSA will go. I'll have to fix it tomorrow as I don't have repository access at the moment.
Edward