MikeNoLastName - 7:53 am on Jul 5, 2012 (gmt 0)
Nope, no redirect on example.htm (no slash)and I guarantee there never was. This isn't even one that we were having phantom redirects on in the past.
I can NOT get the non-slash URL anymore in the search results. Searching for "example.com/example.htm" comes up with only the example.htm/ page. I know this was not the case a couple weeks ago, now that I think about it, because we track that page, amongst many others, for SERP positions and it came up non-slash then.
WMT lists both pages, but shows links to example.htm/ as "via this intermediate link"
This page has a lot of old authoritative links to it (major newspapers, Yahoo, etc.)
I fetched both versions as googlebot last night (after adding the canonical tag) and THOUGHT I had submitted them to try and clear this up, but it looks like it didn't take either, so I just resubmitted them now and it's acting like it accepted both. So hopefully that will clear it up.
I also did the search as Hoople suggested and couldn't find a single instance where it is linked.
Also happened across another, relatively inconsequential page on the same domain indexing only the .htm/. Very strange.