The WTS has sent a letter to all Convention overseers expressing their increasing concern at sisters "directing brothers" at district conventions.
With immediate effect (ie for DC 2008), sisters are no longer to be used as volunteers in Parking and Security / Watchman departments. Any sisters volunteering in other departments (eg toilet cleaning) must be subordinate & follow the direction of appointed brothers.
This move will put a huge burden on the DCs in my area - nearly half the volunteers for parking are sisters and there aren't enough volunteers as it is. The sisters that I know are really upset by the news - volunteering at assemblies was one of the very few things they are allowed to do in the truth.