Hi,

V6.0.3 site, if I click on the "insert/edit image" icon, the popup that appears is just a YSOD with the following stack trace:-

[NullReferenceException: Object reference not set to an instance of an object.]

   umbraco.cms.businesslogic.datatype.DataTypeDefinition.get_DataType() +242

   umbraco.cms.businesslogic.datatype.DataTypeDefinition.<GetByDataTypeId>b__0(DataTypeDefinition x) +6

   System.Linq.WhereArrayIterator`1.MoveNext() +49

   umbraco.cms.businesslogic.datatype.DataTypeDefinition.GetByDataTypeId(Guid DataTypeId) +240

   umbraco.controls.Images.UploadMediaImage..ctor() +70

   ASP.umbraco_controls_images_uploadmediaimage_ascx..ctor() in c:\Users\Craig\AppData\Local\Temp\Temporary ASP.NET Files\root\a13092b9\bff95388\App_Web_uploadmediaimage.ascx.c3c18f9f.iydrf14g.0.cs:0

   ASP.umbraco_plugins_tinymce3_insertimage_aspx.__BuildControlMediaUploader() in c:\VS2012\OI\OI\umbraco\Plugins\Tinymce3\insertImage.aspx:187

   ASP.umbraco_plugins_tinymce3_insertimage_aspx.__BuildControlpane_upload() in c:\VS2012\OI\OI\umbraco\Plugins\Tinymce3\insertImage.aspx:186

   ASP.umbraco_plugins_tinymce3_insertimage_aspx.__BuildControlForm1() in c:\VS2012\OI\OI\umbraco\Plugins\Tinymce3\insertImage.aspx:150

   ASP.umbraco_plugins_tinymce3_insertimage_aspx.__BuildControlTree(umbraco_plugins_tinymce3_insertimage_aspx __ctrl) in c:\VS2012\OI\OI\umbraco\Plugins\Tinymce3\insertImage.aspx:1

   ASP.umbraco_plugins_tinymce3_insertimage_aspx.FrameworkInitialize() in c:\Users\Craig\AppData\Local\Temp\Temporary ASP.NET Files\root\a13092b9\bff95388\App_Web_insertimage.aspx.43b758d9.hmlxmvxu.0.cs:0

   System.Web.UI.Page.ProcessRequest(Boolean includeStagesBeforeAsyncPoint, Boolean includeStagesAfterAsyncPoint) +48

   System.Web.UI.Page.ProcessRequest() +72

   System.Web.UI.Page.ProcessRequestWithNoAssert(HttpContext context) +21

   System.Web.UI.Page.ProcessRequest(HttpContext context) +58

   ASP.umbraco_plugins_tinymce3_insertimage_aspx.ProcessRequest(HttpContext context) in c:\Users\Craig\AppData\Local\Temp\Temporary ASP.NET Files\root\a13092b9\bff95388\App_Web_insertimage.aspx.43b758d9.hmlxmvxu.0.cs:0

   System.Web.CallHandlerExecutionStep.System.Web.HttpApplication.IExecutionStep.Execute() +341

   System.Web.HttpApplication.ExecuteStep(IExecutionStep step, Boolean& completedSynchronously) +69

I've tried republishing the whole site, shutting down and restarting Win7 totally. YSOD still appears. 

I did just remove webservices.dll this morning, as per instructions, but don't know if this was happening before or not as I'm just developing the site and have only just got around to checking this part.

Any clues would be appreciated.

Craig