Does Aperture work well enough in Yosemite DP4 for general browsing/editing or is it pretty buggy overall?
I've not really been affected much by Aperture and Yosemite disagreeing, though I did occasionally see images being replaced by others in earlier betas, and alternate frame corruption in QT7 video playback. b4 seems fine on both fronts.
i did, however, notice one image last night appear very different within Aperture, and when exported as a JPEG. That may have been present for a while, though, as I don't often use the edge sharpen or sharpen brushes. (In the export, the sharpening was much stronger, and thus, noticeably fizzy, being a somewhat high ISO shot)