I tried various combinations of those files from .700 and it destabilized the phone - sys.pim.messages from .700 (10.3.0.135) seemed to cause some especially erratic behavior, including sluggishness, hub fails to load (black screen, no messages or receiving of new messages of any kind) and crazy battery drain. In the end, I just reverted everything back to that bars from .442 and I'm going to deal with the problem until whatever version is next comes out.
It doesn't sound like it's affecting people who installed .700 and the functionality bar pack, but I'm not ready to take that plunge yet - I'm otherwise perfectly happy with my 296/442 hybrid
