kwrite spams stderr with debug on warning box

When kwrite puts up a warning box then the following appears on stderr

Setting new source
New source: QUrl( "file:///usr/share/sounds/KDE-Sys-Warning.ogg" )
Transitioning to state "playing"
State change
Moving from "ready" 1 to "paused" 4
Stream changed to file:///usr/share/sounds/KDE-Sys-Warning.ogg
State change
Moving from "paused" 4 to "playing" 2
About to finish
Got next source. Waiting for end of current.
New source: QUrl( "" )
Finally got a source
About to finish
Got next source. Waiting for end of current.
New source: QUrl( "" )
Finally got a source
Transitioning to state "ready"
State change
Moving from "playing" 2 to "paused" 4
State change
Moving from "paused" 4 to "ready" 1

Makes a mess of the terminal in which it was started. If this must be output it should go to some sort of log file.

A way to get a suitable warning box is to try and open a directory, eg the command:

kwrite .

(Note if kwrite has already been started elsewhere then it will be the stderr of the original invocation, not the stderr of the invocation that triggers the warning).

ProblemType: Bug
DistroRelease: Ubuntu 12.04
Package: kwrite 4:4.8.4-0ubuntu0.1
ProcVersionSignature: Ubuntu 3.2.0-29.46-generic 3.2.24
Uname: Linux 3.2.0-29-generic x86_64
NonfreeKernelModules: nvidia
ApportVersion: 2.0.1-0ubuntu11
Architecture: amd64
Date: Fri Aug 31 10:45:00 2012
ExecutablePath: /usr/bin/kwrite
InstallationMedia: Ubuntu 12.04 LTS "Precise Pangolin" - Release amd64 (20120425)
ProcEnviron:
 TERM=xterm
 SHELL=/bin/bash
 PATH=(custom, no user)
 LANG=en_GB.UTF-8
 LANGUAGE=en_GB:en
SourcePackage: kate
UpgradeStatus: No upgrade log present (probably fresh install)