This one for information mostly:
I had several failed uploads from Ninja lister earlier because some of my photo filenames had a + on the end - eg SG2910+ to distinguish from SG2910
Ninja Lister showed these OK when creating the listing and I only got a (misleading) error in the 'after upload' log - here is an example:
The photo file:xxxxxx.jpg was not sent to eBid from Ninja Lister with your listing data. Please ensure the photo is showing OK within the listing details for this item within Ninja Lister.
It would have been better if Ninja Lister could have picked these errors up at the time of creating.
I have contacted support.