5002 error with iTunes 9.1 when updating apps

10-11  Source: Network gathering  Views:0 

I'm getting a 5002 error whenever I attempt to update an individual app via a 'Get Update' button in iTunes on all accounts on the machine. The app still downloads, but the error dialog comes up every single time. This did not occur prior to an update to Mac OS X 10.6.3 and iTunes 9.1.
Anyone else having this problem or know of a fix? Note that I have already tried the following:
- Clean/reinstall of iTunes.
- Removal/re-add of all apps (and confirmation that even with iTunes only having one app 'installed' the same problem occurs).
- Update of account details.
- Removal and deletion of all ad-hoc builds/apps with 'generic' icons.
Full error message:
"We could not complete your iTunes Store request. An unknown error occurred (5002).
There was an error in the iTunes Store. Please try again later."
This doesn't happen with 'Download All Free Updates', but with multiple account downloads still broken, that button's only an option for me if the apps are for a single account.
Message was edited by: CraigG
The updates still download on my Mac, too - but the dialog is clearly something that shouldn't be there. Regarding the 'major version' error, that, as I stated, is down to multiple accounts. According to my communication with Apple, this is not intentional, but there's also not a timeframe for a fix. (This error started when the update screens started showing apps from all accounts, not just the one signed in.)
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