[boost] [trac config] Too many showstopper bugs

Somehow, it seems like every bug assigned to me has a severity of "Showstopper", which is not quite good. It seems like every editing of issue changes its severity to Showstopper -- for example, Dave just now assigned some bugs to me, and all got Showstopper severity, which is most likely not intended. Could it be some Trac misconfiguration? - Volodya