Here's an excerpt from the release notes for the Linux version:
Version 1.12b.0
+ Added cut, copy, and paste items in the edit menu.
- Removed Boxsizers.
+ Added GridBagSizer
* Repositioned things slightly.
+ Added some new functionality to the undo and redo menu items--that is, they can now grey out.
+ Added clear menu item to edit menu.
+ Added a taskbar icon/favicon thingy.
+ Added a debug submenu to the Help menu
+ added Stats to the debug submenu
Download the Linux release
Download the Windows release
NOTE: Here's a link to the release notes for the Windows version