The Spark trunk has been updated with Smack 3.3 release. Please check the latest nightly.
We have started our pilot testing of Spark (6 users) and i have installed this build (as it improves file transfers and some other stuff). So far so good, though i have noticed weird issues with MUC (no roles icons) and other user reports about empty occupants list issues, though this is probably not related to Smack update. http://community.igniterealtime.org/message/229669#229669
It would be great if spark would have an option to enable/disable Smack’s EntityCaps support. It is currently disabled as default in Smack 3.3.0 and I’d like to gather feedback about it.