#15265 updated ThemeData to use the primary color of a MaterialColor instead of unconditionally using the 500 shade for light themes.  The color values remain unchanged.

    
      
Before
      
expect(widget.color, Colors.blue.shade500) // primary color
      

      
After
      
expect(widget.color, Colors.blue) // primary color

#15548 adds debugging flags debugDisableClipLayers, debugDisablePhysicalShapeLayers and debugDisableOpacityLayers to help with performance diagnosis of rasterizing speed.

Changes in v0.2.3 (since v0.1.5) - beta 1 update

v0.2.0

flutter/engine#4742 updated assets to be read directly out of the APK on Android. As a result, leading slashes are no longer supported in image asset paths: