A bug in MkIV? The left=[ and right=] settings of \definereferenceformat[] bleed through to \in and \at: \definereferenceformat[cite][left={[},right={]}] \starttext \section[sec:test]{Test} \cite[]. Section \in[sec:test]. \stoptext By the way, is \setupreferencing meant for \about only (if so, why the generic name)? -- -- Rogutės Sparnuotos