It is a first version that uses Qt 5.5.1, so some unexpected bugs may occur, you can report the things, that were broken since 0.9.6 version at twitter.com/telegramdesktop.
This version gets the ability to add a caption to any photo you're sending, new beautiful context menus in all of the input fields, the monospace font support using `single backticks` or
``tripple backticks`` syntax and the ~tilde~ symbol display is finally fixed in the 100% interface scale mode. Get this update in Settings or download the new version from https://desktop.telegram.org