Error while downloading iPhone app updates

Yesterday I tried to download two iPhone app updates. The app store showed the two updates that were available, but when I tried to update them, it kept giving me an error message saying that my iTunes store request could not be completed. I am up to date on iPhone, iTunes, and OS X software, so I don't know why it did this. I had no problem downloading the updates directly to my iPhone. Any ideas? I did catch my wife a few weeks ago plugging her iPhone into the Mac while I was logged in (we have separate user accounts on the computer). I immediately ejected it from iTunes and unplugged it. I didn't notice any changes after that, either in my iTunes library or on her iPhone. Did this make any changes that I may not have noticed? Also, this past weekend I purchased some music in my iTunes account and had no problems downloading it and syncing it to my iPod.
Edit: I guess I should have seen the Error 5002 thread. That is what mine is doing. Itunes account set for 1-click. No problem on iPod, just on iPhone apps.

I'm having the same problem. The download finishes and then it says an unknown error occurred. It says it has something to do with my network connection, but I don't think that's the problem.
Did you find a solution yet?
I tried to reinstall iTunes but it didn't work.