I'm very curious if somebody managed to link stunnel against cyassl (1.0.3) instead of using openssl. After reading your changelog I tried but I only run into errors.
I can provide error messages if you need them. But I think this problem can easily be reproduced.
Try 1.0.6. See our download page as well: http://www.yassl.com/download.html, for a Linux build of stunnel with CyaSSL 1.0.6. We have it up there for testing and evaluation purposes.
Let us know how it works out. Sorry we did not respond to this post sooner. It somehow got lost in the mix.