"Mismatched Tag" error during harvest

[mickeroo]

When running harvest for Digital Collections of Colorado archive:

Selected archive: Digital Collections of Colorado
Fetching records...
Harvest URL: http://digitool.library.colostate.edu/OAI-PUB?verb=ListRecords&metadataPrefix=oai_dc&set=wwdl
Finished:
    0 records indexed
    1 seconds elapsed
    0.00 records per second
    5213 records kept from past harvests
    5213 records total.
Errors/Warnings:
    Mismatched tag