Yet another new version of Minecraft was released yesterday. As with the previous two versions, there was no proper announcement. Mojang staff instead chose to update existing posts for previous updates on the Minecraft Tumblr and the Mojang blog.
Minecraft 1.7.9 fixes issues with skins and the new player name changing process (which has yet to be actually enabled).
The JDRGaming Minecraft server will be upgraded to version 1.7.9 shortly.