Attribute CrawlIssueEntry has only one value instead of being an enumeration of values

[GoogleCodeExporter]

What steps will reproduce the problem?
1. When trying to dump all 404 crawl errors from a web site with the code:
    static int DumpCrawlErrors(int startFrom)
    {

        WebmasterToolsService service = new WebmasterToolsService("exampleCo-exampleApp-1");
        service.setUserCredentials("myuser", "mypassword");
        string url = HttpUtility.UrlEncode("http://myDomain.com/");
        string slug = Utilities.EncodeSlugHeader("https://www.google.com/webmasters/tools/feeds/" + url + "/crawlissues/?start-index=" + startFrom + "&max-results=100");

        CrawlIssuesQuery feedQuery = new CrawlIssuesQuery(slug);

        CrawlIssuesFeed feed = service.Query(feedQuery);

        StringBuilder results = new StringBuilder();
        foreach (CrawlIssuesEntry crawlIssuesEntry in feed.Entries)
        {

            string crawlUrl = ((XmlExtension)crawlIssuesEntry.ExtensionElements[2]).Node.InnerText;
            if (crawlIssuesEntry.IssueType == "not-found")
            {
                results.AppendLine(string.Format("{0}\t{1}\t{2}\t{3}", crawlUrl, crawlIssuesEntry.IssueType, crawlIssuesEntry.IssueDetail, crawlIssuesEntry.LinkedFrom));

            }
        }

        System.IO.File.AppendAllText("result.log", results.ToString());

        return feed.Entries.Count;
    }

What is the expected output?
I would expect the attribute crawlIssuesEntry.LinkedFrom to be an 
IEnumerable<String> instead of type String (since the same 404 page is 
referenced by more than one page).

What do you see instead?
The attribute crawlIssuesEntry.LinkedFrom is a single value when the webmaster 
tools page clearly indicates that the 404 page was referenced by a number of 
other pages.

What version of the product are you using? On what operating system?
Version v2.0.50727 of Google.GData.WebmasterTools on Windows 7 SP1 64bits

Original issue reported on code.google.com by rajivkum...@gmail.com on 15 Jan 2014 at 9:46