Pidgin 2.10.8 contained a bug where users could not log in to some XMPP servers. The bug was introduced in one of the security fixes in 2.10.8. The fix is here, if you want to patch it in: https://hg.pidgin.im/pidgin/main/rev/b8e2a5fbffd3 Or of course feel free to package 2.10.9: https://sourceforge.net/projects/pidgin/files/Pidgin/2.10.9/