Get message saying 0 of 0 records were imported and error report says "Error importing data, p (4242610)

I am trying to import some data into one of my tables from a .csv file.  If I import in version 5.0, I get a message saying that 0 of 0 records were imported.  Then when I check the report, it shows the error below.  When using version 4.5 or 4.6 to import the same file into the same table, it works fine.

Thread (14) Import Started [9/14/2010 1:09:31 PM]
Thread (14) Processing "<FileName>" into "<ColumnName>"
Thread (14) Reading from file <FileName>
Thread (14)
Imported rows were rolled back.
Thread (14) Error importing data, please check file format options: Index was out of range. Must be non-negative and less than the size of the collection.
Parameter name: index