I am receiving the following error in the copy to slave plugin.

ERROR: Build step failed with exception
java.util.regex.PatternSyntaxException: Illegal/unsupported escape sequence near index 10
workspace\Nightly_Test_008
^
at java.util.regex.Pattern.error(Unknown Source)
at java.util.regex.Pattern.escape(Unknown Source)
at java.util.regex.Pattern.atom(Unknown Source)

This appeared after I updated to the latest version. I gather it is complaining about the escape character. The path definition is handled under the hood, and I don't seem to have access to change how the path is defined.