I am attempting to load products data in SF and am getting the following issue from data loader:

CSV Error:  Invalid CSV FIle Format.  Please select a different file.  Error reading row #789: the number of data columns (19) exceeds the number of columns in the header (17).

If I remove the row in question, the file loads fine. I put the row into a separate file and load that and everything loads fine.  The original file has about 21000 rows.  Has anyone encountered this issue?