Export to CSV file - strange data going in to a DateTime field

Hi all,

I am doing a simple export to a csv file from a table.

One of the fields, DateAllocated, is a DateTime field.

Some of the NULLS in that field are being converted to TRUE/FALSE values while 2 of them are being converted into what looks like a GUID eg {3554-YTT4-etc etc}

I have checked the offending 10 records and they all have NULL or Valid dates in the table.

This is causing massive problems with subsequent Imports.

Anyone seen this before ?

Thanks in advance.