For the past couple of weeks Pirates@Home tested scheduler restrictions, where only 6.1.14 clients (and later also above) would get work. All below it would get a message that their client wasn't high enough and an immediate 24 hour deferral.
The problem is that when this goes on long enough, the client will lose information like what team the participant is on and what resource share is used. I've tested it with 5.10.45 and it only gave my name and the last amount of credits/RAC that it knew of. I am not on a team according to my BOINC and my resource share is showing as 100 where it should be 850.
According to Eric Myers: "If the scheduler rejects the connection based on version number then there is no RPC exchange, and the client looses track of what team you are in."