Preview fails after inserting TOC macro with "WstxParsingException: Duplicate attribute 'and' "

[Terry Walker]

For confluence server 6.6.2, editing a page with Confluence HTML Macros, Confluence Jira Plugin, RefindedToolKit for Confluence, and Table of Contents Plugin the Preview fails for the TOC Macro section of the page with 

WARN [http-nio-8080-exec-521] [xhtml.view.macro.ViewMacroMarshaller] handleMacroExecutionException Exception executing macro: toc, with message: [com.ctc.wstx.exc.WstxLazyException] com.ctc.wstx.exc.WstxParsingException: Duplicate attribute 'and'.
at [row,col {unknown-source}]:

A quick search found that this problem happens when a page include the Content By Label Macro.  It wasn't occurring before we upgraded from v5.10.8, is this a new problem?