Письмо пришло сегодня от esri:
An issue has been found with some uses of non-English Unicode data
within the personal geodatabase when upgrading to ArcGIS 10. In some
cases, the use of non-English Unicode characters in object names in the
geodatabase are corrupted when the personal geodatabase (access file)
is upgraded to an ArcGIS 10 geodatabase. This error corrupts the source
data and is nonrecoverable. Further details and workarounds are
provided in
knowledge base article 38149.
A software patch is available for this issue. Download now. For further information and assistance, please contact your local Esri distributor.
Интересно, на триал свежепоявившийся его надо ставить?