Because it was announced to some people and not to others.
If RIM has published maintenance windows, it would be nice to REALLY publish them. Some of us monitor our BES for SRP disconnects. It would be nice to tell us when the SRP disconnect is expected under a maintenance window. Again, not something individuals need to get involved with or care about, but if you have an enterprise operations where you monitor outages, this could be an issue.

I'm sure the on-call BES support people would prefer not to get a false alarm phone call from their help desks when they get multiple SRP disconnects.