[Opera-Linux] what's wrong with Opera?? Windows 3.1 look and feel

[atomo64 at gmail.com]

Hi everybody,

I just started Opera as I do everyday but got welcomed with an ugly Windows
3.1-like look.

I believe one screenshot can say more than a thousand words, so check this:
http://files.myopera.com/atomo64/files/ohno.png
It is important to say that NOT the whole interface is affected, mainly some
dialog boxes and the internal close, minimise and maximise buttons.

I'm using Debian GNU/Linux with a mix of testing and unstable packages
(testing has a higher PIN). KDE is my main DE, and even the GTK+/GTK2 apps
use the KDE style/theme; so I have no idea where that ugly interface comes
from.

And here's some info:
$ opera -full-version
Opera 9.24 . Build 671 for Linux. Qt library 3.3.7.
Compiled on Oct 15 2007 by gcc 4.0
using Qt 3.3.4 (i686 Linux g++-4.0.0 full-config no-canvas no-iconview
no-network no-opengl no-sql no-stl no-table no-workspace no-xml)

It's just disgusting, I've even tried to 'fix' it by restarting Opera but
nothing seems to differ.

I hope there's something I can do to fix this.