Why do my Apps stop working?

This was driving me crazy - happy to hear its not just my phone. I had found that if I downloaded apps on the iphone, they worked fine until the next time i synced with my computer, then they all stopped working (re-setting did not solve it). But I found that if I then downloaded another app from the app store on the iphone, the previously not working apps starting working again - as if the process of being validated by the app store (entering username/password) gave the older apps permission to work again. That is until I synced again with my computer, then they stopped working again. This leads me to believe it is all a permissions thing.

I did 2 things but because I did both at the same time not sure which one solved it:

1. authorised my computer with my iTunes account (Authorise computer under store menu)

2. deleted all apps from both iTunes and iPhone and redownloaded all - BUT only on the computer NOT on the iphone (i had read on another forum that there were issues with syncing apps from iPhone to iTunes and is best to do all downloading using iTunes)

Seems to be working ok for me now (fingers crossed).

It sounds like most people have been affected by this bug at some point or another... I suggest we all keep a running tally of our dead apps and missing music problem... Add it to your "other details" under your public profile...

such as....
iphone dead apps & missing music tally = 3

Message was edited by: mintyjulep

I have had this issue for a while. EVERY time i restart the phone i loose my music and apps. The steps that i have used to sort this are as follows.
1. Reset all settings on the phone (You won't loose any data)
2. sync with itunes

This gets all my music and apps back without a 4 hour sync!!!

Or not ..... My phones woked perfectly for ever ... and then i installed 2.1 and ALL My apps stopped working every single one of them! even after a reboot so not the messiah of all bug fixes in my experience! any one else had this? and got round it?

After installing 2.1, all of my apps stopped working, so clearly the bug has not been addressed. I then installed a free app, hoping that signing in to the Apple store would solve the problem, which it didn't. Solved by going to iTunes, highlighting the iphone, clicking applications, deselecting all of them and syncing, which removes all of them from your phone, then reselecting all of them and syncing again, which restored them to full functionality...of course you lose all saved data. Hopefully Apple knows about this and is working on a fix...it is a pain in the butt and a significant issue.