Apple ID won't change in App Store!

Question

Does anyone know how to change the Apple ID in the App store on the iPhone 4? The ID on my MacBook and in my iTunes are both accurate, and it says in the settings of my phone (and even in the app store of my phone) that the Apple ID is accurate, but I went to update my apps and it has an innaccurate ID in the login and it won't change. I've logged out and back in, connected and synced it with my iTunes on my computer, turned it off and on again, and it still won't change when I try to update my apps. Help!

Answer 1

Yes - for those with this problem on the Mac, I fixed mine today. (Merry Christmas!)
1. My situation was interesting. I was logged into the App Store OK as me (you can do this despite the greying out if you go to the STORE menu in the App Store app). This meant that my "Purchases" not yet installed on this particular Macbook Pro were available to install. (It doesn't ask for the password again.) However, my "UPDATES" for software already installed brought up the sign-in dialog box with the previous user's account name greyed out (Admin IT people from my workplace).
2. The two available updates that this clearly affected were iMovie and iPhoto in my case. I therefore followed the advice here about removing the receipt identifying the previous 'purchaser' of these apps. Note: you do that via the PACKAGE of each affected application itself (using the finder) - see the instructions.
THAT FIXED IT.
3. I don't know if this is relevant, but just in case: my Mac had a separate account for our IT dept called 'Administrator'. In System Preferences under USERS & GROUPS, I selected that account and changed its Apple ID (in fact none was set at all - so it might not have been relevant) to my own Apple ID. (No password required here, so not risky on its own I think.) I don't know that this was relevant, and once I had done step 2 above (which I actually did after this one) I simply deleted my ID again from that Administrator account.
Good luck!