Today i found an issue using the new sdk 4.1 that reverses some components like “ComboBoxes” in the  layout by default.

To fix that issue use the following style:

global {
    direction: ltr;
    layoutDirection: ltr;
}

Read this:

http://forums.adobe.com/message/2970461

After extensive testing, I have come to the conclusion no longer use TweenMax (VERSION: 10.12)! TweenMax will not remove the filter as desired. There will always remains in memory and thereby cause Memory Leaks:

TweenMax.killTweensOf(sprite);
TweenMax.to(sprite, 1, {blurFilter:{blurX:55, remove:true}, yoyo:1, ease:Strong.easeOut});

Solution:
Use preferred Tweenlite (VERSION: 10.092) without problems:

//activate blurfilter plugin first to use
TweenPlugin.activate([BlurFilterPlugin]);

TweenLite.killTweensOf(sprite);
TweenLite.to(sprite, 1, {blurFilter:{blurX:55, remove:true}, yoyo:1, ease:Strong.easeOut});