Running a script from the toolbar does impose some constraints. Static variables cease to be static, and, for those that enjoy this sort of thing, the quickest way to actually crash OO3 is to run the following one-liner from the toolbar.

(I don't recommend trying this from the toolbar, incidentally. The same code works fine if run from a Quicksilver trigger)

It would be interesting to know exactly what is happening in your script, but pragmatically the solution may be to assign a Quicksilver keyboard trigger to it.