Warning about Aperture 3.4 update

Had the problem on my iMac but not on my 5 y.o. MacBook

Removing aperture preferences didn't fix it.

Removing aperture preferences in Library/Preferences and imageCapture files in Library/Preferences/ByHost did it.

FWIW, restoring Aperture 3.3.2 from Time Machine then applying the downloaded 3.4 update produced a good Aperture 3.4. (Early on I did that thinking a re-install would fix the problem.)