Am 01.02.2013 12:54, schrieb Moritz Struebe:
(d) remove all preview builds for that version, including their checksums/signatures
I don't think there is a good reason for doing so. Especially as there might be regressions, etc.
+1
Tagging them as preview and moving them to a different folder is enough; you should not remove them from the download area.
-Stefan