NO_MODIFICATION_ALLOWED_ERR: DOM Exception 7

Since Mibbu framework supports CSS animations, it's good moment to create version exclusively for mobile devices, without using heavy and hard to render canvas, and with very limited JavaScript DOM interactions - CSS FTW! So I remove about 50% of code from original branch and test it on my Samsung Wave (bada has one of the best mobile browsers ever, so that was my starting point). And it simply doesn't work:

After short research I saw that Allegro ('Polish Ebay') had the same problem on Desktop Chrome months ago. After couple more hours of reading documentation I found a clue, that Webkit is freaking out if you try to put HTML content into style tag. So I switch

var cssStyle = document.createElement('style');
    cssStyle.innerHTML = 'body { color: #000; }';

to

var cssStyle = document.createElement('style');
    cssStyle.innerText = 'body { color: #000; }';

and everything works.