LAW1143 (1/22/2013)
might this have anything to do with the datatypes of the index columns?
No. Nothing strange about bigint columns.
Just checking... You are rebuilding the same index that you're checking (same table, same database, same server)? Not trying to be insulting, but I've seen many times people working on different servers without realising.
Can you post the table and index definitions?
Gail Shaw
Microsoft Certified Master: SQL Server, MVP, M.Sc (Comp Sci)
SQL In The Wild: Discussions on DB performance with occasional diversions into recoverability