Ok, updated...
Now problems
Those are new.
My CSS is not loaded ok.
<link rel="stylesheet" href="{$SkinDir}/{#CSSFile#}">
Rezult:
<link rel="stylesheet" href="//skin1/skin1.css">
No colors or images can be loaded 
===========
Well.. i'm back to 3.5.0
No more experimenting until stable 3.5.1