Can't update apps
In the App Store, I select the app that I want to update, and I can see a blue "Update" button (with a small "+" sign in the upper left corner).
I select this button, and it is replaced by a green "Install" button. I select it, and the "Update" button reappears.
Basically the update does not start and I can only flip between the "Update" and "Install" buttons.
I have enough free memory on the device and I am able the install new apps. It's the update that appears to be broken.
Any ideas ?
Thanks
iPod Touch 1G, iPhone OS 3.1.3