I hate to cross post, but I wasn't getting any progress with this on serverfault and there appears to be a lot more activity with regard to reporting services here.
I've created a simple report in SSRS, and then tried my hand out with a data driven subscription.
I can verify that the subscription runs on the 'My Subscriptions' page. Under Status it says Done: 1 processed of 1 total; 1 errors.
How do I find out what this error is?
I've looked in the Windows Event Logs and haven't found anything. I also checked the SQL Server Logs and nothing is there either.