[Users] Web UI and new version of SPICE

Hi, A question about SPICE. I noticed that web UI has some options regarding spice protocol. While updating software tonight, spice was upgraded from v.0.8 to v.0.10. My question is how is UI aware of new features in spice? Is it developed for particular version/features of spice? If there is new feature in spice, can the same version of UI use this new features in some way or is the new version of UI required? This could be important as I update system frequently. If version change of spice could somehow influence UI behaviour, than the policy on daily update should be changed... :)