I MAY have uploaded the latest version of Scummbler without actually testing that it worked, and I MAY not have finished writing the code before I uploaded it. Then again, the moon landing MAY have been faked; we just can't be sure about these things, can we?
Anyway, new version of Scummbler that actually works is mysteriously available on the main page.
EDIT: Fixed a few more problems with a couple of instructions in r7.