According to the web site, CIE 6 has "refined ECO codes".
Are these refined ECO codes any different from
http://www.sahovski.co.yu/other/index.php?other=5
and was this page updated accordingly?

Working on the latest editions of ECOs, the Editorial Board has found some unprecise parts in the classification of openings and corrected them. These corrections have been applied then in classification of games in the following volumes of Chess Informant.

For example, here is a list of corrections of ECO codes from the 4th edition of ECO D compared to the 3rd edition:

D 00, D 01, D 11, D 12, D 21, D 22, D 26,
D 27, D 28, D 29, D 33, D 34, D 38, D 39,
D 48, D 49, D 53, D 54, D 58, D 59, D 63,
D 64, D 67, D 68.

CIExpert 6.0 has "refined ECO codes" and the web site has been updated accordingly.

Zdenko Krnic
Editor-in-Chief

After importing the CI Monograph I found an error on game B17/01 in CIE 6 which works fine on CIR 2.1. Any solutions?

Please specify the nature of the error in more detail.