Just in case you're seeing some oddities with 10.7.3 Updates:
Apple removes standard Mac OS X 10.7.3 download due to bugs, offers combined download instead.
http://tinyurl.com/89veuuz (9to5 Mac).
The pre-existing download pages for the 10.7.3 downloads are 'dead ends' right now, if you search for them on Google.
You may need to force a resync of your Apple SUS as well, depending on when they pulled the downloads.
~Ted