This is mainly a bug fixing release, but there's also the new Gamepad object beta. This allows games to be played with controllers like the XBox 360 controller in the browser. It's not yet widely supported though, since you need special builds of Firefox or Chrome to try it. More information in this thread.
Some other minor additions and some useful tweaks to Physics in the changelog below!
Changelog
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Gamepad object beta. For testing purposes only and still missing some basic features. Currently requires special builds of Firefox and Chrome (see
this thread for more information). Button/axis mappings may also be incorrect in some setups and change in future. Currently only tested with XBox 360 controller on Firefox and Chrome and Logitech Dual Action on Firefox.
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Physics: action to enable/disable collisions with other physics objects
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Keyboard shortcut: F6 to export project
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Preferences: new 'Reset dialogs' button which will reset the UI to its default settings. Better than the old delete-registry-key trick.
Change
HTTP preview server now will no longer prompt check failures about "non-GET HTTP request received", instead will simply return 404 for non-GET requests like POST. Also now supports HEAD requests
Change
Order of execution when changing layouts has changed: behaviors now run at the end of the first tick, giving you the chance to disable them in 'start of layout'
Change
Export to PhoneGap: now by default requests no app permissions
Change
Export to PhoneGap: now remembers last entered settings
Change
Touch object: when exporting to AppMobi, can now use AppMobi-provided accelerometer values for 'alpha', 'beta' and 'gamma' if the browser does not support accelerometer. Useful for Android devices. Note in my testing with a HTC Sensation the values did not correspond exactly to the HTML5 accelerometer values, but it should be better than nothing.
Change
Updated Google Closure Compiler to latest version
Bug Fix
Physics: some things caused joints to be removed (changing animation frame, or certain actions). This should no longer happen and the joints should always remain.
Bug Fix
Check failure adding an object to a family with family variables
Bug Fix
Could not edit existing family variables (incorrect prompt about name in use)
Bug Fix
Chrome's sticky/delayed keyboard input bug is now worked around and hopefully does not happen any more.
Bug Fix
8 Direction: improved angle setting when sliding against solids, providing collision mask is symmetrical
Bug Fix
Sprite, Particles: did not properly take in to account the object time scale
Bug Fix
Destroying objects on start of layout did not immediately hide them, leaving them there for one tick
Bug Fix
Sometimes max() and min() incorrectly threw invalid parameter errors
Bug Fix
'count' expression on families gave wrong number
Bug Fix
Platform behavior: should now be able to correctly jump up "ladders" of jump-thru objects
Bug Fix
Cut/copy while renaming an item in the Project/Object/Layer bar would take effect in the layout view or event sheet view instead