I'm just going through one of my static sites with a fine tooth comb, checking links etc. All part of trying to make Panda think its a nice site.
I spotted an error which I think was produced by having the sitemap produced by an automated service at some time which must have had a bug in it. For some directories I had /directory/ and /directory/index.html listed and therefore a duplicate. To compound the problem this is repeated in a sitemap.html and sitemap.xml.
I don't think this is a major issue but thought I'd mention it for other folks check lists. If you think this might be a problem please chime in.
Cheers
Sid