Build Issues report a Warning to be an Error

Warnings from standard error output such as:
WARNING: e:\NokiaQtSDK\Simulator\Qt\msvc2008\lib\qtmaind.prl:1: Unescaped backslashes are deprecated.

are reported to be Errors, and are marked as errors in the Build Issues.
This happened when running Simulator with a QML project.

(Almost)Full Compile output:
Running build steps for project untitled111...
Starting: "e:\nokiaqtsdk\simulator\qt\msvc2008\bin\qmake.exe" C:\tmp2\untitled111\untitled111.pro -r -spec win32-msvc2008 "QMLJSDEBUGGER_PATH=E:/qt/qt-4.7/creator-test/share/qtcreator/qml/qmljsdebugger"
WARNING: e:\NokiaQtSDK\Simulator\Qt\msvc2008\lib\qtmaind.prl:1: Unescaped backslashes are deprecated.
WARNING: e:\NokiaQtSDK\Simulator\Qt\msvc2008\lib\QtDeclaratived.prl:1: Unescaped backslashes are deprecated.
WARNING: e:\NokiaQtSDK\Simulator\Qt\msvc2008\lib\QtGuid.prl:1: Unescaped backslashes are deprecated.
WARNING: e:\NokiaQtSDK\Simulator\Qt\msvc2008\lib\QtCored.prl:1: Unescaped backslashes are deprecated.
WARNING: e:\NokiaQtSDK\Simulator\Qt\msvc2008\lib\qtmain.prl:1: Unescaped backslashes are deprecated.
WARNING: e:\NokiaQtSDK\Simulator\Qt\msvc2008\lib\QtDeclarative.prl:1: Unescaped backslashes are deprecated.
WARNING: e:\NokiaQtSDK\Simulator\Qt\msvc2008\lib\QtGui.prl:1: Unescaped backslashes are deprecated.
WARNING: e:\NokiaQtSDK\Simulator\Qt\msvc2008\lib\QtCore.prl:1: Unescaped backslashes are deprecated.
The process "e:\nokiaqtsdk\simulator\qt\msvc2008\bin\qmake.exe" exited normally.
Starting: "E:\Workspace\jom\jom\bin\jom.exe"
E:\Workspace\jom\jom\bin\jom.exe -nologo -j 4 -f Makefile.Debug
cl c -nologo -Zm200 -Zc:wchar_t -Zi -MDd -GR -EHsc -W3 -w34100 -w34189 -DUNICODE -DWIN32 -DQT_LARGEFILE_SUPPORT -DQT_DLL -DQT_DECLARATIVE_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_THREAD_SUPPORT -I"e:\NokiaQtSDK\Simulator\Qt\msvc2008\include\QtCore" -I"e