http://mfile.akamai.com/5913/wmv/whitehouse.download.akamai.com/5913/2006/01/20060131-10.v.asx
Fast-forward to about 45:50 to see it. And at 46:05, take careful note of who you see in the lower left corner of the frame.
Hint: he didn't vote "present" this time.
Thanks for posting this. Rush mentioned it today and I planned to look for it online tonight.