Why are my image export settings not honored when using the plug-in in Aperture 3?
As of Aperture 3.0.3 this has been resolved, please update your software via Software Update or manually here. In Aperture versions 3, 3.0.1 and 3.0.2 there is a bug that causes plug-ins to specify the last used preset in Aperture’s export dialogue instead of the one you choose when in the export plug-in module. A suggested workaround is to export an image normally using the wanted preset in Aperture, then use the plug-in for that setting chosen previously.