Insignificant.
Bug fixes:

    Prevent multiple loop() and/or animation() calls.
    loop(0, { ... }).

Improvements:

    In-browser code editor's HTML, CSS, and JS are streamlined.
    Higher quality random number generator.
    Better code editor toolbar icons.
    Refactoring of random('color').
    Simpler loop constructs.
    Code auto save.

Website:

    Adding Facebook, Google+, Twitter, support@owlscript.org
    Smoother top menu contours.
    Footer.

Other:

    Changing startup code to random circles.
    Minor documentation refactoring.
    Minor code refactoring.