Downloaded "A Czar is Born" and when i attempted to open the game, a popup told me "Cannot load verions 301; expected version 300 or lower"

Really rather confused by this ... it appeared to be looking for an EARLIER version?

Thought I might try downloading the most recent patch if I needed it ... and that opened a whole new can of worms:

1. when I tried search for updates, it said that I needed to download the latest patch.  When I did so, I got no install popups.  But the game froze, telling me that I had to wait for it to finish downloading the update.  After a half hour, I gave up.  I tried it again, and let it run for 3 hours; still said it was busy downloading the update.

2.  Went directly to firaxis to download the patch.  did so in less than a minute, installed it in five.  Tried opening the saved game, I got the same popup. 

3.  Tried searching for updates again:  See #1.

4.  The game still plays fine, otherwise.

When I click on "About this Build" I get the following:

Civ version: 300

Save version: 300

Build Version: 3.0.0.86 (74099)

Date: June 28, 2007 (FINAL RELEASE)

Any thoughts?

DD