k3b fails to write an ISO to any medium

[Anton Kanishchev]

Steps to repeat

1-Download any ISO.
2-right click on iso from file manager and click "open with k3b".
3-K3b program will open.(the empty medium is in the optical drive)
4-press burn
5-disk spins up for about 25 seconds, then K3b throws an error, "probably a problem with the medium"

I have tried several good quality dvd's and cd's, the same problem occurs. No problem is experienced when burning files(drag and drop folders into dvd) to the medium.

what should have happened- the iso should have burnt well onto the dvd, and the dvd ejected.

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: k3b 2.0.2-3ubuntu4
ProcVersionSignature: Ubuntu 3.2.0-35.55-generic-pae 3.2.34
Uname: Linux 3.2.0-35-generic-pae i686
NonfreeKernelModules: fglrx
ApportVersion: 2.0.1-0ubuntu15.1
Architecture: i386
Date: Wed Dec 19 10:56:18 2012
ExecutablePath: /usr/bin/k3b
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release i386 (20120423.2)
MarkForUpload: True
ProcEnviron:
 LANGUAGE=en_GB:en
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 SHELL=/bin/bash
SourcePackage: k3b
UpgradeStatus: No upgrade log present (probably fresh install)