I just got the 4Up Apple script a few days ago. Installed script and all 4 presets (the latter show up where the should in the effects drop down in Aperture). When I run the script it seems to work fine. Four files result from the action and all are labeled just as the script promised to tell me which preset was applied. The problem is that only 2 presets are applied. Both versions with curves have the RGB curves applied rather than luminance and RBG. In the case of levels, only the luminance levels are applied to both versions.
Any idea what is wrong?