Easy enough to fix, though, with my new Plot Disarming addon, which removes the plot-item flag from certain items after they've served their plot purpose. Currently we cover the aforementioned Cap and the three strange black disks from the G.E.M.; if there are any other items I've missed that could benefit from this treatment, let me know and I'll try to add them.
And no, this probably won't be going into ZOmnibus.

[Technical notes:]
Code: Select all
Hooks:
Quest:setStatus [to unplot Cap of the Undisturbed Mind]
Chat:load [to unplot strange black disks]