MikeNoLastName - 10:20 am on Jul 10, 2012 (gmt 0)
Just to follow up: I inserted the canonical tag and then did the two "fetch as googlebot" as previously mentioned and as of today the original, non slash, page is back in the search index and the trailing slash listing is gone. However BOTH still show up in WMT, although none of the pages I checked (internal or external) that it claims link to the trailing slash version, do so.
Even more interestingly the list of links in WMT to the trailing-slash listing NOW says "via the NON-slash URL as the intermediate link" while the non-slash URL does NOT! A complete reversal of the previous case. lol. More fun with Google bugs.
Did NOT put a redirect in .htaccess, there is no reference to that page whatsoever in .htaccess.