Now I'm getting the following error:

Fatal error: Cannot pass parameter 3 by reference in /home/lafflamc/public_html/testing/modules/ubercart/uc_order/uc_order.module on line 2352

Following advice from an earlier post, I changed the NULL on line 2353 of the uc_order.module to $null.

The error went away, but the stock level did not decrease following an order.

I am using:

PHP 4.4.4
MySQL 4.1.22-standard-log
Ãœbercart bazaar

Is PHP4 the problem?

I will make the changes necessary to run PHP5 and give that a try...I'll let you know how it goes.