After updating, opening any item causes an error:
[ERROR] Script execution error: [string "campaign/scripts/item_main.lua"]:121: attempt to index global 'divider6' (a nil value)
I deactivated extensions, and the error stopped with Custom Item Generator disabled, so that seems to be the culprit.
Does that sound like an extension that would attempt to index global 'divider6'? :)

