Upgraded to 1.334 and encountered a problem with using a custom workspace:
FATAL: Failed to mkdirs: D:\devtools\Hudson\N:\
java.io.IOException: Failed to mkdirs: D:\devtools\Hudson\N:\
at hudson.FilePath.mkdirs(FilePath.java:744)
at hudson.model.AbstractProject.checkout(AbstractProject.java:1004)
at
hudson.model.AbstractBuild$AbstractRunner.checkout(AbstractBuild.java:431)
at hudson.model.AbstractBuild$AbstractRunner.run(AbstractBuild.java:378)
at hudson.model.Run.run(Run.java:1176)
at hudson.model.FreeStyleBuild.run(FreeStyleBuild.java:46)
at hudson.model.ResourceController.execute(ResourceController.java:88)
at hudson.model.Executor.run(Executor.java:123)

I have the custom workspace set to N:\ which is a substed drive on a Windows XP
machine. Not sure if the substing is relevant, but figured I'd mention it (I'm
guessing not). Rolling back to 1.333 fixed the issue for me.