The Qt build included in the Qt SDK contains various temporary files generated by moc and rcc, e.g. c:\Qt\2010.04\qt\exmaples\animation\animatedtiles\tmp\moc\release_shared\main.moc.

The debug mode versions of these files are provided so that users can step through them in a debugger, but the fact that the installer makes them read-only causes problems when users try to rebuild parts of the package, e.g. as reported in QTCREATORBUG-1889.

The release mode files are virtually useless and should be removed. They also cause the same build problems by being installed read-only.