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 {
004
005 if (email.Contains("://"))
006
007 return
008
009 string.Format(
010
011 "<img class=\"thumb\" src=\"http://images.websnapr.com/?url={0}&size=t\" alt=\"{1}\" />", name,
012
013 email);
014
015 //http://www.artviper.net/screenshots/screener.php?&url={0}&h={1}&w={1}
016
017 MD5 md5 = new MD5CryptoServiceProvider();
018
019 byte[] result = md5.ComputeHash(Encoding.ASCII.GetBytes(email));
020
021
022
023 StringBuilder hash = new StringBuilder();
024
025 for (int i = 0; i < result.Length; i++)
026
027 hash.Append(result[i].ToString("x2"));
028
029
030
031 StringBuilder image = new StringBuilder();
032
033 image.Append("<img src=\"");
034
035
036
037 //Change the url
038
039 image.Append("http://en.gravatar.com/avatar/");
040
041
042
043 //Change the MD5 hash appending code
044
045 image.Append(hash.ToString());
046
047
048
049 image.Append("&rating=G");
050
051 image.Append("&size=" + size);
052
053 image.Append("&default=");
054
055 image.Append(Server.UrlEncode(Utils.AbsoluteWebRoot + "themes/" + BlogSettings.Instance.Theme + "/noavatar.jpg"));
056
057 image.Append("\" alt=\"\" />");
058
059 return image.ToString();
060
061 }
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.
8a1202df-2dcb-4992-8187-de99dff77d75|1|5.0