Tradepost working half the times
After the las big Patch, Selling YS at Tradepost had disappeared for me. The only (and strange) solution was what I’ve found here in some post. There is an Username/AppData/Temp – something folder with gw2cache in it, BUT the TEMP folder was in ReadOnly mode at my WinXP. As soon as I changed it, the Sale at Tradepost had returned. I don’t understand the whole thing, but it works now since this folder changing.
This is a bug caused by a recent update to the 3rd party program(millenium) that GW2 uses to help manage the trading post. The recent patch updated the system for millenium and caused a minor error. You see when a program like this works with a game it uses target lines in order to refer to a certain part of the game and recognize and compute that part of the game. The recent patch updated the system but seems to of failed in altering the target line in order to fix said program. This could be remedied by a quick fix patch.