Bug? Opera

Hi.

I am running your site and even here I don't get all UI right.

I didn't find any info at support forum so it could just be me, but......
for example:

Tree missing '+' and '-'
tabs have no layout, no function, just text

But still it's enough information to browse, but missing details.

I'am running Opera:

Version
9.26
Build
8835
Platform
Win32
System
Windows XP
Java
Java not installed
XHTML+Voice
Plug-in not loaded

And UI 2.5.1