Google is your friend

If the changelog is gonna end up getting posted anywhere, it would be here http://iptvtalk.org/showthread.php?33061-New-System-Firmware-Version-2-7-76

The OP on that thread works for Dreamlink and he's pretty awesome at posting the release notes for every update as well as general information, how-to's and answering questions you may have

Here are the notes he posted last week in anticipation of the release http://iptvtalk.org/showthread.php?32906-Dreamlink-T1-Plus-Update-Notice

Personally, I'm very interested in these items

-. Improved UX for multi-depth VOD contents (Series/Season/Episodes/etc) -. Improved Channel List and Info Bar UX -. Improved grid EPG performance -. Improved support for user-downloaded audio codecs. -. General performance enhancements, UI improvements, and bug fixes

Not holding my breath for the EPG issues to be fixed. I'd expect if they fixed that, it would be the first bullet point in the release notes, not tucked away near the bottom