When I delete a node I get this error message:

Error handling action

No Document exists with Version '00000000-0000-0000-0000-000000000000'

The node is deleted properly. I have been programatically sorting and moving nodes. Is there anything that I might have tripped over?

I do this after save:

Document newParent = DocumentHelper.GetCorrectParentForPost(date, sender);

if (newParent.Id != sender.ParentId)
{
    sender.Move(newParent.Id);
    DocumentHelper.SortPostsByDate(newParent.Children, sender);
}

And here is my sorting method:

  /// <summary>
/// 
/// </summary>
/// <param name="posts"></param>
/// <param name="document"></param>
public static void SortPostsByDate(IEnumerable<Document> posts, Document document)
{
    // remove the search node from the list
    IEnumerable<Document> documents = posts.Where(x => x.Id != document.Id);


    DateTime newDate = DateTime.Parse(document.getProperty("uBlogsyPostDate").Value.ToString());
    var nodeSorter = new umbraco.presentation.webservices.nodeSorter();
    string sortOrder = string.Empty;

    if (documents.Count() == 0)
    {
        return;
    }

    if (newDate > DateTime.Parse(documents.Last().getProperty("uBlogsyPostDate").Value.ToString()))
    {
        // new document should be at the end
        sortOrder = string.Join(",", documents.Select(x => x.Id)) + "," + document.Id;
        nodeSorter.UpdateSortOrder(document.ParentId, sortOrder);
        return;
    }


    bool found = false;
    foreach (var d in documents)
    {
        if (newDate <= DateTime.Parse(d.getProperty("uBlogsyPostDate").Value.ToString()))
        {
            // insert post here!
            if (!found)
            {
                sortOrder += document.Id + ",";
                found = true;
            }
        }
        sortOrder += d.Id + ",";
    }

    nodeSorter.UpdateSortOrder(document.ParentId, sortOrder.TrimEnd(','));
}