repeated purple to blue transistions for disabled, offline servers

[Tom Georgoulias]

I've got 2 servers offline at the moment and I'm using the disabled 
function to prevent them from alerting/paging.  What is confusing to me 
is the way that my hobbit front page and the individual monitored 
parameters for the system keep transitioning between purple and blue. 
Shouldn't they all just stay blue until the disabled period ends?

Tom