...installed the carbonized versions...
When I installed KPT Collection plug-ins, there were three choices for the plug-in type to install:
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Install compatible with OS 8.6-9.x (Non-Carbon)
Ex: Photoshop 4-6
Install compatible with OS X (Carbon) hosts
Ex: Painter 7
Install Package
Ex: Photoshop 7
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I don't know if KO or Effects have the same install options.
For Photoshop 7 on OS X, I chose the LAST one (Package), NOT the carbon one. (For Bryce 5, I chose the carbon install.)
Plugs show up fine in both apps.
Moving them around after installing is probably not a good idea.