This is a hypothesis more than a traditional bug report. I saw it in r10021 but it has been going on for a bit longer.
I have scripts that transfer items to and from my DC so that I can use them while adventuring but get "credit" for them when Jicken Wings updates the DC database. One of the items is in the outfit I use for minimizing cost when casting. At the end of a session, I typically change to the MinCast outfit, cast from the relay browser, switch back to my rollover outfit and run the script that returns items to the DC. When I visit my inventory in the relay browser after all of this, the outfit piece is still in my inventory. If I re-run the transfer script (or just transfer it manually) things work and it disappears from my inventory.
My suspicion is that because of multi-threading, the transfer thread thinks the outfit piece is still equipped when it tries the transfer.
I have scripts that transfer items to and from my DC so that I can use them while adventuring but get "credit" for them when Jicken Wings updates the DC database. One of the items is in the outfit I use for minimizing cost when casting. At the end of a session, I typically change to the MinCast outfit, cast from the relay browser, switch back to my rollover outfit and run the script that returns items to the DC. When I visit my inventory in the relay browser after all of this, the outfit piece is still in my inventory. If I re-run the transfer script (or just transfer it manually) things work and it disappears from my inventory.
My suspicion is that because of multi-threading, the transfer thread thinks the outfit piece is still equipped when it tries the transfer.