I bit the bullet and trashed the entire ubercart directory on my site. Then I uploaded bazaar revision 736. The USPS quote began collecting quotes. However, there are two problems:

1) The priority mail quote is always listed with a lower cost than the parcel post. In my experience with the post office, the reverse is normally true.

2) When I click on review order button with any of the shiping methods selected, I get a long list of errors (21 to be exact) similar to this (but with different handlers):

warning: xml_parse(): Unable to call handler _startElement() in .../sites/all/modules/ubercart/uc_store/includes/simplexml.php on line 244.

The last error in the list is:

Invalid option selected. Recalculate shipping quotes to continue.