Hi Jeroen,

I have the same problem, and after re-creating the CreateCrops dll I found the following exception:

   at System.Data.SqlServerCe.SqlCeDataReader.get_HasRows()
   at SqlCE4Umbraco.SqlCeDataReaderHelper.get_HasRecords()
   at CreateCrops.CC_Helper.CallImagecropper(Int32 mediaId) in [...]\CreateCrops\CC_Helper.cs:line 58
   at CreateCrops.CC_Helper.CreateCrops() in [..]\CreateCrops\CC_Helper.cs:line 36

I'm using the SqlCE database that comes with Umbraco 4.7.1 and I had a suspicion that it might have been contributing to this issue since I've had CreateCrops and DAMP run nicely in the past on other installations.

Changing CC_Helper.cs from

        public static bool CallImagecropper(int mediaId)
        {
            bool result = false;
            IDataType newObject = new Factory().GetNewObject(new System.Guid("7A2D436C-34C2-410F-898F-4A23B3D79F54"));
            string commandText = string.Format("\r\n                        select cpd.id as id, cpt.dataTypeId as datatypeid from cmsPropertyData cpd\r\n                            inner join cmsPropertyType cpt on cpd.propertytypeid = cpt.Id\r\n                            inner join cmsDataType cdt on cpt.dataTypeId = cdt.nodeId\r\n                        where cpd.contentNodeId = {0}\r\n                        and cdt.controlId = '{1}'", mediaId, newObject.Id);
            using (IRecordsReader recordsReader = CC_Helper.SqlHelper.ExecuteReader(commandText, new IParameter[0]))
            {
                if (recordsReader.HasRecords)
                {
                    result = true;
                    while (recordsReader.Read())
                    {
                        newObject.Data.PropertyId = recordsReader.GetInt("id");
                        newObject.DataTypeDefinitionId = recordsReader.GetInt("datatypeid");
                        CC_ImageCropper cC_ImageCropper = new CC_ImageCropper(newObject.Data, ((PrevalueEditor)newObject.PrevalueEditor).Configuration);
                        cC_ImageCropper.Page = new Page();
                        cC_ImageCropper.CallInit();
                        cC_ImageCropper.Save();
                    }
                }
            }
            return result;
        }

to

        public static bool CallImagecropper(int mediaId)
        {
            bool result = false;
            IDataType newObject = new Factory().GetNewObject(new System.Guid("7A2D436C-34C2-410F-898F-4A23B3D79F54"));
            string commandText = string.Format("\r\n                        select cpd.id as id, cpt.dataTypeId as datatypeid from cmsPropertyData cpd\r\n                            inner join cmsPropertyType cpt on cpd.propertytypeid = cpt.Id\r\n                            inner join cmsDataType cdt on cpt.dataTypeId = cdt.nodeId\r\n                        where cpd.contentNodeId = {0}\r\n                        and cdt.controlId = '{1}'", mediaId, newObject.Id);
            using (IRecordsReader recordsReader = CC_Helper.SqlHelper.ExecuteReader(commandText, new IParameter[0]))
            {
                while (recordsReader.Read())
                {
                    result = true;
                    newObject.Data.PropertyId = recordsReader.GetInt("id");
                    newObject.DataTypeDefinitionId = recordsReader.GetInt("datatypeid");
                    CC_ImageCropper cC_ImageCropper = new CC_ImageCropper(newObject.Data, ((PrevalueEditor)newObject.PrevalueEditor).Configuration);
                    cC_ImageCropper.Page = new Page();
                    cC_ImageCropper.CallInit();
                    cC_ImageCropper.Save();
                }
            }
            return result;
        }

has fixed the problem.  I'm now going to go and make the equivalent change in DAMP and re-compile that as well...

Rob.