I was doing quests and when I went to "purchase" something from my shop that's highlighted in blue, I get this message: "Your most recent purchase failed. An unknown error occurred." The the item disappears from my shop and it's not in my inventory.

Same here, I've lost about 5 items already today due to this. I checked through account search and the items were definitely in my shop. As soon as I click the move button they disappear from my shop and are also no longer traceable through account search.

I am also experiencing this. I get a notification that says "Your most recent purchase failed. An unknown error occurred." (in red) and then the item is moved from my shop but not in my inventory.

Yeah me too....

Yup. Items just vanish entirely (and I've checked shop logs - they're not being sneakily bought out from under me). If I move the item through account search it works perfectly. It's only glitching on the shop search.

I had this occur to me four times this morning. I stopped selecting the Move button and used either the NPC or User Shop link. These other two still work.

Thanks! That was quick! I am ok not getting back my 2k SP item xP