This release contains a major cookie overhaul. We moved cookies from a universal cookie jar into each thread. They are persisted and managed on a thread-by-thread basis. So each thread behaves as its own unique browser.
This release also contains several bug fixes, including HTTPS CONNECT issues, 403 auto recovery, content-type parsing, cookie domain handling, thread pool issues, and synchronized shutdown issues.
All Siege users should update to 2.4.0