Linux Mint 17.3 was supposed to have been released at the end of last month, but that seems to have been delayed until further notice.
And that could be linked to the fact that the developers and administrators are still busing trying to bring the main website and forums back online, which has been down since yesterday.
At about early hours of yesterday, the site was completely offline, and remained that way all day.
Today, if you try to access the website, you’ll get the message shown in the screen shot below. So let’s hope they succeed in fixing whatever the problem is and get back to working on releasing Linux Mint 17.3, which should feature Cinnamon 2.8.