How to disable instrumentation in rails 3?

There is a bug in jruby that causes thread locks around things like
accesses to class attributes created with class_attribute. The
notifications system is affected by this, and it's blowing up our app.
We need to disable all instrumentation and notifications for the time
being. Anyone know how to do that cleanly?

CHris

when you figure it out, could you drop me a line?

SC