Windows XP, Mercurial Distributed SCM (version bbdcdc7f170e+20070829)

started
ERROR: Failed to clean the workspace
java.io.IOException: Unable to delete
D:\Programs\hudson\jobs\Anagram\workspace\.hg\hgrc
at hudson.Util.deleteFile(Util.java:140)
at hudson.Util.deleteRecursive(Util.java:148)
at hudson.Util.deleteContentsRecursive(Util.java:119)
at hudson.Util.deleteRecursive(Util.java:147)
at hudson.Util.deleteContentsRecursive(Util.java:119)
at hudson.Util.deleteRecursive(Util.java:147)
at hudson.FilePath$5.invoke(FilePath.java:342)
at hudson.FilePath$5.invoke(FilePath.java:340)
at hudson.FilePath.act(FilePath.java:280)
at hudson.FilePath.deleteRecursive(FilePath.java:340)
at hudson.plugins.mercurial.MercurialSCM.clone(MercurialSCM.java:183)
at hudson.plugins.mercurial.MercurialSCM.checkout(MercurialSCM.java:125)
at hudson.model.AbstractProject.checkout(AbstractProject.java:518)
at hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:213)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:179)
at hudson.model.Run.run(Run.java:579)
at hudson.model.Build.run(Build.java:103)
at hudson.model.ResourceController.execute(ResourceController.java:66)
at hudson.model.Executor.run(Executor.java:62)
finished: FAILURE