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.
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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.