Once empathy was closed and opened again, the participant window in the chat windows was still expanded. So I don't know if the collapsed windows was something from my session or was related to the Natty update. As I said in the last comment it happened also to another participant of the chat who had updated to Natty.
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/747791 Title: Empathy in Ubuntu 11.04 does not have right sidebar with participants in IRC chat -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
