Set Authors error: array_fill and array_map errors blogger.php after importing

I’m having problem with the “Set Authors” part of the Import process. Here’s what I did:

• I’m using Wordress 2.9.2
• Used the Import feature to import my Blogger blog from blogspot.com. That part worked fine. It imported 3772 posts.
• Next, I click the Set Authors button to match my old Blogger authors to the new WordPress users I set up for them. I have 10 users on Blogger, and 13 users in WordPress. I get this error:

Warning: array_fill() [function.array-fill]: Number of elements must be positive in <my install location>/wp-admin/import/blogger.php  on line 658

Warning: array_map() [function.array-map]: Argument #3 should be an array in <my install location>/wp-admin/import/blogger.php on line 658

Warning: Invalid argument supplied for foreach() in <my install location>/wp-admin/import/blogger.php on line 669

Where <my install location> is the path on my web host where I have WordPress installed.

Any ideas?