I just installed v3.0 and this issue has not been fixed. When creating a new item, the shipping tab still shows every shipping method instead of just the shipper selected in BuyNow settings, and it does not actually save the methods selected even though it will give a message saying "Record Saved".
Please release a fix for this. This is the only outstanding error in the cart (that I am aware of), and I would like to have it resolved for my client so I can finally have a problem(error) free product for them.