I'm currently setting up a OSX 10.10.4 Test system.
After realizing that Apple releases new frameworks only in 64-bit (and Python with PyObjC is all about using these) I threw away my 32-bit only Python and replaced it with a 64-bit only system.
So here is a fresh compiled Cactus 64-bit for Yosemite. It also contains some small changes that accumulated but weren't simply worth a release.
The keyboard shortcuts are still not configurable, so if you want to use ctrl-left/ctrl-right you have to re-assign these shortcuts in the system preferences.
I only did a short test but it looks good.
-karstem