Currently (as described in http://feedback.userecho.com/topic/453744-edit-pos...
) there is a pop-up menu to "Edit" any reply message (less than 2 hours after writing it).
But this action "Edit" is different just for the first message of a topic:
then you don't have any pop-up menu, but you can use the "Edit" icon in the right column.
Wouldn't it be more user-friendly to propose (also) the usual pop-up menu for the main actions shortcuts ("Reply/Edit/Delete") dynamically appearing next to the author line of a first message of a topic, as well as it appears next to any author line of a reply in the topic?