Like many HI forumites I also buy knives at the Bladeforums Exchange now and then, and I like to leave feedback for the seller (so far it's always been positive feedback). With the "New & Improved BladeForums" software, it has become a little trickier to leave feedback, as I and a number of other people have discovered recently.
To avoid getting an error message you have to leave the feedback from inside the sales thread. You also have to first post a message inside the sales thread before you can leave feedback. That is not intuitive because sometimes a buyer might just PM the seller to conduct the transaction.
You have to do both of those things. Otherwise you will get a pretty uninformative error message saying that you have not provided a correct URL for the feedback, and you might spin your wheels for a while trying to figure out why the URL is incorrect (which it isn't).
To avoid getting an error message you have to leave the feedback from inside the sales thread. You also have to first post a message inside the sales thread before you can leave feedback. That is not intuitive because sometimes a buyer might just PM the seller to conduct the transaction.
You have to do both of those things. Otherwise you will get a pretty uninformative error message saying that you have not provided a correct URL for the feedback, and you might spin your wheels for a while trying to figure out why the URL is incorrect (which it isn't).