Probably old news, but thought I'd point out that Kurt Stephens: http://kurtstephens.com/node/148 thinks that this type of bug: http://timetobleed.com/the-broken-promises-of-mrireeyarv/ is "is probably due to faulty register spilling" in the collector or what not. Sorry I can't be of more help. Also sorry if it's old news. -roger-