When I tried to upload items to Google Base under view errors and suggestions I get:

8320 of 13061 items inserted - Processed on Jul 24, 2009 7:42 pm PDT

Detected encoding: ISO-8859-1 [Latin-1, ASCII]
Detected delimiter: Tab (\t)
Detected file format: Text

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Feed Level Messages

Warning: Missing recommended attribute: upc
While items missing recommended attributes will process successfully, we recommend including relevant attributes if they are available.

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Item Errors - 13 items with errors
13
Missing required attribute: description
Please make sure you include all required attributes in your data feed.

Examples:
Item Nr. Line Nr.
12,176 12,177
12,177 12,178
13,048 13,049
13,052 13,053
13,054 13,055

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None of my items have UPC codes, so that was appropriately left blank.

The descriptions only account for 13 items out of over 4700 that were omitted.

Any ideas?