I just loaded ZD 7.2.5 on a new iMac. I synced items OK, can add and remove zimlets, can create folders, but I cannot send a new message, reply or forward.
UPDATE
After I disabled a couple of the zimlets I had added, those items work now.
sticky notes
email templates
colored emails seem to work.
I got these from the guthub repo that had updates. Just bought I'd pass the word.