Discovered due to invalid Copy... message to mailbox silently failing. 1. Added new mailbox (moved it to top -- relevant? [1]) 2. Copy... a message destination selector pointed to new [top] mailbox[2] (not inbox, ...) 3. OK silently ignored copy action. Suggest to not select/allow mailbox as destination (gray out mailboxes) [1] destination dialog defaulted to the new mailbox; after selecting its inbox, all future defaults were inbox. [2] tested with another new mailbox; but destination default still preselected inbox, so this may be a first-use-only issue. (I don't recall ever using Copy... previously)