My problem with this would be that (1) I'm pretty sure the OP's ability to make an edit expires at some point, requiring a moderator to do it and (2) since many people don't follow up, unless mods were to be really aggressive about keeping track, there would probably be more posts than not that are not marked as "solved" that really are. I know it's a big important thing on some forums but it never was here, and now we have a lot of old content without that.
I'd be totally down for it to be part of the software on the new forum.
Join the #python-forum IRC channel on irc.freenode.net for off-topic chat!
Please prefer not to PM members. The point of the forum is so that anyone can benefit. We don't want to help you over PMs/emails/Skype chats that others can't benefit from