Pixie 1.4 had been for Tiger and Pixie 2.x reserved for Leopard. Now
here is Pixie 2.0 for Tiger, courtesy of some Developer Preview
archive 9A241

Compatibility
Architecture: PPC x86 (Intel:Mac)

Requires OS X 10.4 Tiger,
Leopard has updates such as v2.2 - Pixie was
included in the public Developer Tools so
Pixie versions other than this aren't special.