diff --git a/basis/compiler/cfg/value-numbering/rewrite/rewrite.factor b/basis/compiler/cfg/value-numbering/rewrite/rewrite.factor
index 0dea35409d..bc8fc50547 100755
--- a/basis/compiler/cfg/value-numbering/rewrite/rewrite.factor
+++ b/basis/compiler/cfg/value-numbering/rewrite/rewrite.factor
@@ -52,9 +52,12 @@ M: insn rewrite ;
         [ src2>> tag-mask get bitand 0 = ]
     } 1&& ; inline
 
+: tagged>constant ( n -- n' )
+    tag-bits get neg shift ; inline
+
 : (rewrite-tagged-comparison) ( insn -- src1 src2 cc )
     [ src1>> vreg>expr in1>> vn>vreg ]
-    [ src2>> tag-bits get neg shift ]
+    [ src2>> tagged>constant ]
     [ cc>> ]
     tri ; inline
 
@@ -206,15 +209,20 @@ M: ##or-imm rewrite [ bitor ] \ ##or-imm combine-imm ;
 
 M: ##xor-imm rewrite [ bitxor ] \ ##xor-imm combine-imm ;
 
-: rewrite-add? ( insn -- ? )
-    src2>> vreg-small-constant? ;
-
-M: ##add rewrite
-    dup rewrite-add? [
+: new-arithmetic ( obj op -- )
+    [
         [ dst>> ]
         [ src1>> ]
-        [ src2>> vreg>constant ] tri \ ##add-imm new-insn
-        dup number-values
-    ] when ;
+        [ src2>> vreg>constant ] tri
+    ] dip new-insn dup number-values ; inline
 
-M: ##sub rewrite constant-fold ;
+: rewrite-arithmetic ( insn op -- ? )
+    over src2>> vreg-small-constant? [
+        new-arithmetic constant-fold
+    ] [
+        drop
+    ] if ; inline
+
+M: ##add rewrite \ ##add-imm rewrite-arithmetic ;
+
+M: ##sub rewrite \ ##sub-imm rewrite-arithmetic ;
diff --git a/basis/math/matrices/matrices.factor b/basis/math/matrices/matrices.factor
index b939162577..3203355bb9 100644
--- a/basis/math/matrices/matrices.factor
+++ b/basis/math/matrices/matrices.factor
@@ -120,7 +120,7 @@ IN: math.matrices
 
 PRIVATE>
 
-: cross ( vec1 vec2 -- vec3 ) [ i ] [ j ] [ k ] 2tri 3array ;
+: cross ( vec1 vec2 -- vec3 ) [ [ i ] [ j ] [ k ] 2tri ] keep 3sequence ;
 
 : proj ( v u -- w )
     [ [ v. ] [ norm-sq ] bi / ] keep n*v ;
diff --git a/basis/specialized-vectors/functor/functor.factor b/basis/specialized-vectors/functor/functor.factor
index 6635fbeaf2..08c44cd197 100644
--- a/basis/specialized-vectors/functor/functor.factor
+++ b/basis/specialized-vectors/functor/functor.factor
@@ -1,6 +1,6 @@
 ! Copyright (C) 2008, 2009 Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
-USING: functors sequences sequences.private growable
+USING: accessors alien.c-types functors sequences sequences.private growable
 prettyprint.custom kernel words classes math parser ;
 QUALIFIED: vectors.functor
 IN: specialized-vectors.functor
@@ -21,6 +21,8 @@ V A <A> vectors.functor:define-vector
 
 M: V contract 2drop ;
 
+M: V byte-length underlying>> byte-length ;
+
 M: V pprint-delims drop \ V{ \ } ;
 
 M: V >pprint-sequence ;
diff --git a/basis/ui/gadgets/worlds/worlds.factor b/basis/ui/gadgets/worlds/worlds.factor
index ed21c85b19..0c59af95d6 100755
--- a/basis/ui/gadgets/worlds/worlds.factor
+++ b/basis/ui/gadgets/worlds/worlds.factor
@@ -163,9 +163,11 @@ M: world resize-world
 M: world (>>dim)
     [ call-next-method ]
     [
-        dup handle>>
-        [ [ set-gl-context ] [ resize-world ] bi ]
-        [ drop ] if
+        dup active?>> [
+            dup handle>>
+            [ [ set-gl-context ] [ resize-world ] bi ]
+            [ drop ] if
+        ] [ drop ] if
     ] bi ;
 
 GENERIC: draw-world* ( world -- )