Failed to transcode URL

Last post by CyberAlien: Thanks for suggestion, but it wasn't it. Even with scripts removed Opera Mini was still showing error.

I did some debugging by removing parts of code, rounded problem to this code:

	.nodeList .node span.brc,
	.nodeList .node.groupNoChildren:after,
	.nodeList .node.level_2:after
	{
		content: '';
		display: block;
		position: absolute;
		left: 0;
		right: 0;
		bottom: -10px;
		background: url('@imagePath/xenforo/layout/shadows.png') no-repeat 0 0,
	url('@imagePath/xenforo/layout/shadows.png') no-repeat 100% -15px,
	transparent url('@imagePath/xenforo/layout/shadows.png') repeat 0 -30px;
		height: 10px;
	}

(note @imagePath is replaced with correct path to image in css output)

To be more specific, problem was in long background line. Removed that line - error disappeared.
So I've added check for Opera Mini user agent via JavaScript and additional code to reset that background for it. That seems to work.

However, now I'm getting weird problem. These 2 URLs show identical content, hosted on same server:

http://www.artodia.com/forum/ - doesn't work
http://xftest.trushkin.biz/forum/ - works

Opera Mini is showing errors on first URL, no errors on second URL. All other test URLs work fine as well. Any ideas?