I agree on the character of the errors with the 039 dsldriver. My tests of the 8800NL gave similar resullts regarding the nature of the extra errors That gave on my line.
http://forum.kitz.co.uk/index.php?topic=14030.msg271125#msg271125 As you imply the question is whether or not the differences will affect the DLM? My feeling is that SES would be a more sensible DLM counter than an ES which may arise due to just a single CRC, but BT may or may not be sensible.