So you thought I didn't notice that Butler's performance is far from perfect on Mac OS X 10.4, a.k.a. "Tiger"? Not true. In fact, I have been working on this bug-fix release for a while. I just couldn't reply to your bug reports because the computer that was responsible for handling my e-mail correspondence was having severe problems.
Anyway, now that the most obvious bugs are squashed, the new beta is available. Please note that Butler 4.0b24 has only been tested on Mac OS X 10.4.1 so far. Reports on bugs and/or regressions on earlier operating systems are very welcome.