OK, this is certainly not a big deal, but seems easy to alter (though perhaps others will see it different than I do):
At the top of the message body, on the right, there are icons:
Header, Reply, Delete, Font Size, Actions
Seems to me the most common should be first, with the most common being "reply". Also would give a bit of distance between Reply and Delete, and with Delete having no verification, I can see room for significant error here.
Unless Delete is quite common, perhaps that would be best done in the Action menu... but either place I would recommend a confirmation (think I said that for deletion of groups but not posts... maybe I am wrong).
Overall looks like the product is coming along very nicely.