I've noticed that the tags I've put on ensembles disappear when I save the ensemble again from Reaktor. Not Save As apparently but just save to same file name when I made an minor update. And looking at the file in Finder the file disappears for a short moment and then reappears just as the file is deleted and the creted again by Reaktor.
The consequence how ever is that using and maintaining tags is more or less impossible as I need to re-tag the file each I make an update, like adding a new snapshot. Pretty hopeless.... I whish Reaktor had a built in ensemble browser with tags like Kontakt... or am I missing something?