Thanks all, its working. Sorry for late since I have an external hard drive now get damaged..

Just wait, I need to reinstall my OS because it seems when I try msstyle of the last beta version WSB experiencing crashes.

Overall become blank, nothing to improve through safemode, until safemode command prompt is also blank.

I guess the final version also has a lot of bugs, some of which I have set become "has stopped working".

Or maybe actually my OS already troubled.

Your image tests fine for me.

Which version WSB you use? I try like you all said but my computer get blank because theme fail to launch

Here my friend..

I already upload it, u can't see it?    
http://goo.gl/7pog7W

Ok i reupload again,

Image in cloud drive's Google http://goo.gl/7pog7W

Looks like what you all see, there is solid drop shadow behind taskbar preview. Yesterday I try change in Taskbar & System Tray > TaskBand > Aero > TaskBandExtendedUI > Horizontal > Thumbnails & Controls > BackgroundShadow but didnt work.

So I googling and found location path Windows 8 (For Testing Purposes Only) > Taskband Extended UI > Background now its change but problem like the image.

Which my problem..?

UPDATE::

I can't upload to imgurl, there is something wrong with my connection. And one more thing, please some one report my previous post. Thanks

Looks like what you all see, there is solid drop shadow behind taskbar preview. Yesterday I try change in Taskbar & System Tray > TaskBand > Aero > TaskBandExtendedUI > Horizontal > Thumbnails & Controls > BackgroundShadow but didnt work.

So I googling and found location path Windows 8 (For Testing Purposes Only) > Taskband Extended UI > Background now its change but problem like the image.

Which my problem..?