BlogEngine .NET 1.3 uses www.gravatar.com/avatar.php?gravatar_id=[MD5 Hash] to retreive Gravatar images for the comments. But this url is not supported by Gravatar anymore as far as I understand. We have to replace this url with this one http://en.gravatar.com/avatar/.
In order correct this url open CommentView.ascx.cs file found in "User controls" folder and replace the source code of the Gravatar method with this one
001 protected string Gravatar(string email, string name, int size)
002 {
003 if (email.Contains("://"))
004 return
005 string.Format(
006 "<img class=\"thumb\" src=\"http://images.websnapr.com/?url={0}&size=t\" alt=\"{1}\" />", name,
007 email);
008 //http://www.artviper.net/screenshots/screener.php?&url={0}&h={1}&w={1}
009 MD5 md5 = new MD5CryptoServiceProvider();
010 byte[] result = md5.ComputeHash(Encoding.ASCII.GetBytes(email));
011
012 StringBuilder hash = new StringBuilder();
013 for (int i = 0; i < result.Length; i++)
014 hash.Append(result[i].ToString("x2"));
015
016 StringBuilder image = new StringBuilder();
017 image.Append("<img src=\"");
018
019 //Change the url
020 image.Append("http://en.gravatar.com/avatar/");
021
022 //Change the MD5 hash appending code
023 image.Append(hash.ToString());
024
025 image.Append("&rating=G");
026 image.Append("&size=" + size);
027 image.Append("&default=");
028 image.Append(Server.UrlEncode(Utils.AbsoluteWebRoot + "themes/" + BlogSettings.Instance.Theme + "/noavatar.jpg"));
029 image.Append("\" alt=\"\" />");
030 return image.ToString();
031 }
After changing the url in source code you do not nedd to build/recompile BE you simply replace the old file with the modified one.
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