MIME Conversion problems since upgrading to 8.5.1

I recently upgraded a Domino Server from 8.0.2 to 8.5.1 and since I did the upgrade I am getting the following error:

On the Domino Server Log:

27/11/2009 09:06:31 AM Invalid arguments

27/11/2009 09:06:31 AM MIME to CD error (Process: Agent Manager (000014D0:00000002), Database: E:\Lotus\Domino\data\E6\ControlledActions.nsf, Note: 000A375A): Invalid arguments

27/11/2009 09:06:31 AM End MIME to CD Conversion (Process: Agent Manager (000014D0:00000002), Database: E:\Lotus\Domino\data\E6\ControlledActions.nsf, Note: 000A375A)

On the browser I get the following error:

"Error 4547 - Character set is not recognized "

The code fails on:

Call bodyChild.SetContentFromText (stream, “text/html;charset=ISO-8859-1”, ENC_NONE)

The code fragment I am using is:

Set mailMemo = BaseApp.Database.CreateDocument

With mailMemo

    .Form = "Memo"

.InheritedDBTitle = BaseApp.Database.Title

Set SendTo = mailMemo.ReplaceItemValue( "SendTo", mailAddressList.Values)

End With

BaseApp.session.ConvertMIME = False ’ Do not convert MIME to rich text Set stream =

BaseApp.session.CreateStream

Set body = mailMemo.CreateMIMEEntity

Set stream = BaseApp.session.CreateStream

Call stream.WriteText(||)

… other code to build the body

Set bodyChild = body.CreateChildEntity()

’ Fails here !!!

Call bodyChild.SetContentFromText (stream, “text/html;charset=ISO-8859-1”, ENC_NONE)

Call stream.Close

Call stream.Truncate

BaseApp.session.ConvertMIME = True