A simple addon to save and set on login the state of each bag's "Ignore this Bag" checkbox. Enables you to set the addon once and have it autocheck the box for you on login. No more re-ignoring each bag. Syntax is simple, type /bagfix for instructions.
All credit for the idea of this addon, including prodding me to do something about it, goes to Monkedintime-Caelestrasz.