I've noticed that duplicates are downloaded if they come from separate RSS feeds and only have differing non alphanumeric characters. For instance some are separated with a dot, others with a dash. SAB currently doesn't recognise these as duplicates.
Is it possible to add this or would it cause problems elsewhere?
I haven't looked at that no, but will do thankyou.
I guess it would be extravagant to support cross-RSS matching if there is something better in the pipeline. I looked on the blueprints and didn't see anything mentioned. Have you any idea how far in the future?