--- ray/doc/man/man1/rcomb.1	2023/12/19 00:39:03	1.3
+++ ray/doc/man/man1/rcomb.1	2023/12/25 16:29:56	1.4
@@ -1,4 +1,4 @@
-.\" RCSid "$Id: rcomb.1,v 1.3 2023/12/19 00:39:03 greg Exp $"
+.\" RCSid "$Id: rcomb.1,v 1.4 2023/12/25 16:29:56 greg Exp $"
 .TH RCOMB 12/5/2023 RADIANCE
 .SH NAME
 rcomb - combine and convert matrices a row at a time
@@ -330,6 +330,12 @@ is not supported in
 .I rcomb,
 and should instead be handled by
 .I pfilt(1).
+.SH BUGS
+The
+.I rcomb
+command currently ignores the "PRIMARIES" setting in input
+headers, and does not produce any on output, even in
+circumstances where it would make sense to.
 .SH AUTHOR
 Greg Ward
 .SH "SEE ALSO"