Yawp 1.0.3 is online now. This is a bugfix release; I was using "@include" instead of "include" for hook scripts, which effectively turns off error reporting inside those hook scripts. Yawp uses just "include" now; sorry for any trouble this may have caused when troubleshooting.
At the same time, this uncovered a bug inside PEAR Benchmark_Timer; you can read more about that here.
Are you stuck with a legacy PHP application?
You should buy my book
because it gives you a step-by-step guide to improving you
codebase, all while keeping it running the whole time.