Error on content submit: array_merge() in upload.module

Running Drupal 6.2 on FreeBSD 6.2-RELEASE (hey, that's kinda neat! ;-)) with PHP 5.2.6 and getting the following error when submitting blog content:

Type	php
Date	Saturday, June 21, 2008 - 21:21
User	Brian Shumate
Location	http://www.example.com/upload/js
Referrer	http://www.example.com/node/add/blog

Message

array_merge() [<a href='function.array-merge'>function.array-merge</a>]: Argument #2 is not an array in /usr/www/users/example/example.com/modules/upload/upload.module on line 615.
...

1. Created blog content, entered some content, attached a file, and then attempted to submit the blog content
2. Expected to see shiny new blog content :-)
3. Instead, I got the white screen of death, and the PHP error above in my /admin/reports/event/... :-(

Apologies in advance if this is a dupe - I searched and did not find this exact issue

Thanks, and rock on, fellow Drupallers!