diff --git a/docs/src/installing-miller.md b/docs/src/installing-miller.md
index 6169ff18f..9f19c4375 100644
--- a/docs/src/installing-miller.md
+++ b/docs/src/installing-miller.md
@@ -32,7 +32,7 @@ As a first check, you should be able to run `mlr --version` at your system's com
 <b>mlr --version</b>
 </pre>
 <pre class="pre-non-highlight-in-pair">
-mlr 6.0.0-dev
+mlr 6.0.0-rc
 </pre>
 
 As a second check, given [example.csv](./example.csv) you should be able to do
diff --git a/docs/src/manpage.md b/docs/src/manpage.md
index 4a591235a..e7a958405 100644
--- a/docs/src/manpage.md
+++ b/docs/src/manpage.md
@@ -50,7 +50,7 @@ DESCRIPTION
        insertion-ordered hash map.  This encompasses a variety of data
        formats, including but not limited to the familiar CSV, TSV, and JSON.
        (Miller can handle positionally-indexed data as a special case.) This
-       manpage documents mlr 6.0.0-dev.
+       manpage documents mlr 6.0.0-rc.
 
 EXAMPLES
        mlr --icsv --opprint cat example.csv
@@ -3040,5 +3040,5 @@ SEE ALSO
 
 
 
-                                  2021-12-27                         MILLER(1)
+                                  2021-12-30                         MILLER(1)
 </pre>
diff --git a/docs/src/manpage.txt b/docs/src/manpage.txt
index 0eb839907..1a44c5f79 100644
--- a/docs/src/manpage.txt
+++ b/docs/src/manpage.txt
@@ -29,7 +29,7 @@ DESCRIPTION
        insertion-ordered hash map.  This encompasses a variety of data
        formats, including but not limited to the familiar CSV, TSV, and JSON.
        (Miller can handle positionally-indexed data as a special case.) This
-       manpage documents mlr 6.0.0-dev.
+       manpage documents mlr 6.0.0-rc.
 
 EXAMPLES
        mlr --icsv --opprint cat example.csv
@@ -3019,4 +3019,4 @@ SEE ALSO
 
 
 
-                                  2021-12-27                         MILLER(1)
+                                  2021-12-30                         MILLER(1)
diff --git a/internal/pkg/version/version.go b/internal/pkg/version/version.go
index 89199e98b..083e470b1 100644
--- a/internal/pkg/version/version.go
+++ b/internal/pkg/version/version.go
@@ -1,4 +1,4 @@
 package version
 
 // STRING is the current Miller major/minor/patch version as a single string.
-var STRING string = "6.0.0-dev"
+var STRING string = "6.0.0-rc"
diff --git a/man/manpage.txt b/man/manpage.txt
index 0eb839907..1a44c5f79 100644
--- a/man/manpage.txt
+++ b/man/manpage.txt
@@ -29,7 +29,7 @@ DESCRIPTION
        insertion-ordered hash map.  This encompasses a variety of data
        formats, including but not limited to the familiar CSV, TSV, and JSON.
        (Miller can handle positionally-indexed data as a special case.) This
-       manpage documents mlr 6.0.0-dev.
+       manpage documents mlr 6.0.0-rc.
 
 EXAMPLES
        mlr --icsv --opprint cat example.csv
@@ -3019,4 +3019,4 @@ SEE ALSO
 
 
 
-                                  2021-12-27                         MILLER(1)
+                                  2021-12-30                         MILLER(1)
diff --git a/man/mlr.1 b/man/mlr.1
index a60a32b46..6a5a561c1 100644
--- a/man/mlr.1
+++ b/man/mlr.1
@@ -2,12 +2,12 @@
 .\"     Title: mlr
 .\"    Author: [see the "AUTHOR" section]
 .\" Generator: ./mkman.rb
-.\"      Date: 2021-12-27
+.\"      Date: 2021-12-30
 .\"    Manual: \ \&
 .\"    Source: \ \&
 .\"  Language: English
 .\"
-.TH "MILLER" "1" "2021-12-27" "\ \&" "\ \&"
+.TH "MILLER" "1" "2021-12-30" "\ \&" "\ \&"
 .\" -----------------------------------------------------------------
 .\" * Portability definitions
 .\" ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
@@ -47,7 +47,7 @@ on integer-indexed fields: if the natural data structure for the latter is the
 array, then Miller's natural data structure is the insertion-ordered hash map.
 This encompasses a variety of data formats, including but not limited to the
 familiar CSV, TSV, and JSON.  (Miller can handle positionally-indexed data as
-a special case.) This manpage documents mlr 6.0.0-dev.
+a special case.) This manpage documents mlr 6.0.0-rc.
 .SH "EXAMPLES"
 .sp
 
diff --git a/todo.txt b/todo.txt
index 48d0381d8..e268bd72a 100644
--- a/todo.txt
+++ b/todo.txt
@@ -1,30 +1,7 @@
 ================================================================
 PUNCHDOWN LIST
 
-* blockers:
-  - cmp-matrices
-    > X_as_bool del
-    > mvcmp mix
-
-      internal/pkg/bifs/arithmetic.go
-      internal/pkg/bifs/bits.go
-      internal/pkg/bifs/booleans.go
-      internal/pkg/bifs/collections.go
-      internal/pkg/bifs/mathlib.go
-      internal/pkg/bifs/sort.go
-      internal/pkg/bifs/strings.go
-      internal/pkg/bifs/types.go
-
-      internal/pkg/mlrval/mlrval_cmp.go
-      internal/pkg/mlrval/mlrval_cmp_test.go
-      internal/pkg/mlrval/mlrval_constants.go
-      internal/pkg/mlrval/mlrval_is.go
-      internal/pkg/mlrval/mlrval_type.go
-
-  - docs re mods contact
-
-* cases/dsl-min-max-types: cmp-matrices need to be fixed to follow the advertised rule for mixed types
-  NUMERICS < BOOL < VOID < STRING
+* compat emph
 
 * doc
   o new-in-miller-6: missings:
@@ -61,6 +38,8 @@ PUNCHDOWN LIST
 ================================================================
 NON-BLOCKERS
 
+* cmp for array & map
+
 * r-strings/implicit-r/297: double-check end of reference-main-data-types.md.in
 
 * sysdate, sysdate_local; datediff ...