Rails spinoffs - Aug 2005 - some script.aculo.us effects not working?

The effects Effect.Puff and Effect.SwitchOff on the demo site are not
working, and Toggle.display and Element.show are also failing on a
site I''m developing with the current version of the script.aculo.us
effects.

This is occuring on both Safari and Firefox on my Mac.

No javascript errors are thrown, either.

Anyone else having this issue?
-- Chris Johnson
cj@ceejayoz.com