I'm getting this now also - just as of tonight (my only recent change is the InDesign updated from 6 to 6.01).
Whatever I try to in the production tool, it gives me the 2038 error ( review selected, review all, create mib etc.).
I have checked everything you have listed above (including restarting) I can connect to the iPad on the 50000 port, no hidden .LOCK files in the folder, evertything all fine, yet it won't let me review or export anything.
Between that and the InDesign error that crashes when you allow jpegs in the export, and an error I get every time I review that it 'Failed to remove existing assets folder' Im not having a very productive weekend.