diff --git a/basis/fry/fry.factor b/basis/fry/fry.factor
index 395d5c3caf..87c59e18a0 100644
--- a/basis/fry/fry.factor
+++ b/basis/fry/fry.factor
@@ -1,7 +1,7 @@
 ! Copyright (C) 2008 Slava Pestov, Eduardo Cavazos.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel sequences combinators parser splitting math
-quotations arrays make qualified words ;
+quotations arrays make words ;
 IN: fry
 
 : _ ( -- * ) "Only valid inside a fry" throw ;
diff --git a/basis/qualified/qualified-docs.factor b/basis/qualified/qualified-docs.factor
index d62f696a74..067d221d2f 100644
--- a/basis/qualified/qualified-docs.factor
+++ b/basis/qualified/qualified-docs.factor
@@ -32,3 +32,14 @@ HELP: RENAME:
     "RENAME: + math => -"
     "2 3 - ! => 5" } } ;
 
+ARTICLE: "qualified" "Qualified word lookup"
+"The " { $vocab-link "qualified" } " vocabulary provides a handful of parsing words which give more control over word lookup than is offered by " { $link POSTPONE: USE: } " and " { $link POSTPONE: USING: } "."
+$nl
+"These words are useful when there is no way to avoid using two vocabularies with identical word names in the same source file."
+{ $subsection POSTPONE: QUALIFIED: }
+{ $subsection POSTPONE: QUALIFIED-WITH: }
+{ $subsection POSTPONE: FROM: }
+{ $subsection POSTPONE: EXCLUDE: }
+{ $subsection POSTPONE: RENAME: } ;
+
+ABOUT: "qualified"
diff --git a/basis/qualified/qualified-tests.factor b/basis/qualified/qualified-tests.factor
index 8f67ddf730..78efec4861 100644
--- a/basis/qualified/qualified-tests.factor
+++ b/basis/qualified/qualified-tests.factor
@@ -1,24 +1,33 @@
-USING: tools.test qualified ;
-IN: foo
+USING: tools.test qualified eval accessors parser ;
+IN: qualified.tests.foo
 : x 1 ;
-IN: bar
+: y 5 ;
+IN: qualified.tests.bar
 : x 2 ;
-IN: baz
+: y 4 ;
+IN: qualified.tests.baz
 : x 3 ;
 
-QUALIFIED: foo
-QUALIFIED: bar
-[ 1 2 3 ] [ foo:x bar:x x ] unit-test
+QUALIFIED: qualified.tests.foo
+QUALIFIED: qualified.tests.bar
+[ 1 2 3 ] [ qualified.tests.foo:x qualified.tests.bar:x x ] unit-test
 
-QUALIFIED-WITH: bar p
+QUALIFIED-WITH: qualified.tests.bar p
 [ 2 ] [ p:x ] unit-test
 
-RENAME: x baz => y
+RENAME: x qualified.tests.baz => y
 [ 3 ] [ y ] unit-test
 
-FROM: baz => x ;
+FROM: qualified.tests.baz => x ;
 [ 3 ] [ x ] unit-test
+[ 3 ] [ y ] unit-test
 
-EXCLUDE: bar => x ;
+EXCLUDE: qualified.tests.bar => x ;
 [ 3 ] [ x ] unit-test
+[ 4 ] [ y ] unit-test
 
+[ "USE: qualified IN: qualified.tests FROM: qualified.tests => doesnotexist ;" eval ]
+[ error>> no-word-error? ] must-fail-with
+
+[ "USE: qualified IN: qualified.tests RENAME: doesnotexist qualified.tests => blah" eval ]
+[ error>> no-word-error? ] must-fail-with
diff --git a/basis/qualified/qualified.factor b/basis/qualified/qualified.factor
index d636cc0152..d387ef4b0e 100644
--- a/basis/qualified/qualified.factor
+++ b/basis/qualified/qualified.factor
@@ -1,12 +1,12 @@
 ! Copyright (C) 2007, 2008 Daniel Ehrenberg.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel sequences assocs hashtables parser lexer
-vocabs words namespaces vocabs.loader debugger sets ;
+vocabs words namespaces vocabs.loader debugger sets fry ;
 IN: qualified
 
 : define-qualified ( vocab-name prefix-name -- )
     [ load-vocab vocab-words ] [ CHAR: : suffix ] bi*
-    [ -rot >r append r> ] curry assoc-map
+    '[ [ [ _ ] dip append ] dip ] assoc-map
     use get push ;
 
 : QUALIFIED:
@@ -19,27 +19,27 @@ IN: qualified
 
 : expect=> ( -- ) scan "=>" assert= ;
 
-: partial-vocab ( words name -- assoc )
-    dupd [
-        lookup [ "No such word: " swap append throw ] unless*
-    ] curry map zip ;
-
-: partial-vocab-ignoring ( words name -- assoc )
-    [ load-vocab vocab-words keys swap diff ] keep partial-vocab ;
-
-: EXCLUDE:
-    #! Syntax: EXCLUDE: vocab => words ... ;
-    scan expect=>
-    ";" parse-tokens swap partial-vocab-ignoring use get push ; parsing
+: partial-vocab ( words vocab -- assoc )
+    '[ dup _ lookup [ no-word-error ] unless* ]
+    { } map>assoc ;
 
 : FROM:
     #! Syntax: FROM: vocab => words... ;
     scan dup load-vocab drop expect=>
     ";" parse-tokens swap partial-vocab use get push ; parsing
 
+: partial-vocab-excluding ( words vocab -- assoc )
+    [ load-vocab vocab-words keys swap diff ] keep partial-vocab ;
+
+: EXCLUDE:
+    #! Syntax: EXCLUDE: vocab => words ... ;
+    scan expect=>
+    ";" parse-tokens swap partial-vocab-excluding use get push ; parsing
+
 : RENAME:
     #! Syntax: RENAME: word vocab => newname
-    scan scan dup load-vocab drop lookup [ "No such word" throw ] unless*
+    scan scan dup load-vocab drop
+    dupd lookup [ ] [ no-word-error ] ?if
     expect=>
     scan associate use get push ; parsing
 
diff --git a/basis/ui/gadgets/lists/lists.factor b/basis/ui/gadgets/lists/lists.factor
index 62e5b7d780..17fe68721d 100644
--- a/basis/ui/gadgets/lists/lists.factor
+++ b/basis/ui/gadgets/lists/lists.factor
@@ -97,7 +97,7 @@ M: list focusable-child* drop t ;
     ] if ;
 
 : select-gadget ( gadget list -- )
-    swap over children>> index
+    tuck children>> index
     [ swap select-index ] [ drop ] if* ;
 
 : clamp-loc ( point max -- point )
diff --git a/basis/ui/gadgets/scrollers/scrollers.factor b/basis/ui/gadgets/scrollers/scrollers.factor
index fefce8a040..633e3ad4a8 100644
--- a/basis/ui/gadgets/scrollers/scrollers.factor
+++ b/basis/ui/gadgets/scrollers/scrollers.factor
@@ -41,7 +41,7 @@ scroller H{
         dup model>> dependencies>> first  <x-slider> >>x dup x>> @bottom grid-add
         dup model>> dependencies>> second <y-slider> >>y dup y>> @right  grid-add
 
-        swap over model>> <viewport> >>viewport
+        tuck model>> <viewport> >>viewport
         dup viewport>> @center grid-add ;
 
 : <scroller> ( gadget -- scroller ) scroller new-scroller ;
diff --git a/core/parser/parser-docs.factor b/core/parser/parser-docs.factor
index 1d8d1f0714..d33f5cd6d9 100644
--- a/core/parser/parser-docs.factor
+++ b/core/parser/parser-docs.factor
@@ -69,7 +69,7 @@ $nl
 { $subsection POSTPONE: PRIVATE> }
 { $subsection "vocabulary-search-errors" }
 { $subsection "vocabulary-search-shadow" }
-{ $see-also "words" } ;
+{ $see-also "words" "qualified" } ;
 
 ARTICLE: "reading-ahead" "Reading ahead"
 "Parsing words can consume input:"
diff --git a/core/parser/parser.factor b/core/parser/parser.factor
index a86715b073..ed8fc4510b 100644
--- a/core/parser/parser.factor
+++ b/core/parser/parser.factor
@@ -71,10 +71,10 @@ ERROR: no-current-vocab ;
         ] keep
     ] { } map>assoc ;
 
-TUPLE: no-word-error name ;
+ERROR: no-word-error name ;
 
 : no-word ( name -- newword )
-    dup no-word-error boa
+    dup \ no-word-error boa
     swap words-named [ forward-reference? not ] filter
     word-restarts throw-restarts
     dup vocabulary>> (use+) ;
diff --git a/extra/mason/release/tidy/tidy.factor b/extra/mason/release/tidy/tidy.factor
index a456e6ff23..fb931650d4 100644
--- a/extra/mason/release/tidy/tidy.factor
+++ b/extra/mason/release/tidy/tidy.factor
@@ -1,16 +1,14 @@
 ! Copyright (C) 2008 Eduardo Cavazos, Slava Pestov.
 ! See http://factorcode.org/license.txt for BSD license.
 USING: kernel namespaces continuations debugger sequences fry
-io.files io.launcher mason.common mason.platform
+io.files io.launcher bootstrap.image qualified mason.common
 mason.config ;
+FROM: mason.config => target-os ;
 IN: mason.release.tidy
 
 : common-files ( -- seq )
+    images [ boot-image-name ] map
     {
-        "boot.x86.32.image"
-        "boot.x86.64.image"
-        "boot.macosx-ppc.image"
-        "boot.linux-ppc.image"
         "vm"
         "temp"
         "logs"
@@ -20,7 +18,8 @@ IN: mason.release.tidy
         "unmaintained"
         "unfinished"
         "build-support"
-    } ;
+    }
+    append ;
 
 : remove-common-files ( -- )
     common-files [ delete-tree ] each ;
diff --git a/vm/cpu-x86.32.S b/vm/cpu-x86.32.S
index e0e674a7e2..eec850dc9e 100755
--- a/vm/cpu-x86.32.S
+++ b/vm/cpu-x86.32.S
@@ -10,14 +10,18 @@ and the callstack top is passed in EDX */
 #define DS_REG %esi
 #define RETURN_REG %eax
 
+#define NV_TEMP_REG %rbx
+
 #define CELL_SIZE 4
 #define STACK_PADDING 12
 
 #define PUSH_NONVOLATILE \
 	push %ebx ; \
+	push %ebp ; \
 	push %ebp
 
 #define POP_NONVOLATILE \
+	pop %ebp ; \
 	pop %ebp ; \
 	pop %ebx
 
diff --git a/vm/cpu-x86.64.S b/vm/cpu-x86.64.S
index 15a4eb8da3..c981095d62 100644
--- a/vm/cpu-x86.64.S
+++ b/vm/cpu-x86.64.S
@@ -7,6 +7,8 @@
 #define CELL_SIZE 8
 #define STACK_PADDING 56
 
+#define NV_TEMP_REG %rbp
+
 #ifdef WINDOWS
 
 	#define ARG0 %rcx
@@ -20,9 +22,11 @@
 		push %rdi ; \
 		push %rsi ; \
 		push %rbx ; \
+		push %rbp ; \
 		push %rbp
 
 	#define POP_NONVOLATILE \
+		pop %rbp ; \
 		pop %rbp ; \
 		pop %rbx ; \
 		pop %rsi ; \
@@ -41,9 +45,11 @@
 		push %rbx ; \
 		push %rbp ; \
 		push %r12 ; \
+		push %r13 ; \
 		push %r13
 
 	#define POP_NONVOLATILE \
+		pop %r13 ; \
 		pop %r13 ; \
 		pop %r12 ; \
 		pop %rbp ; \
diff --git a/vm/cpu-x86.S b/vm/cpu-x86.S
index 3d6cacdebd..1857fb0ed8 100755
--- a/vm/cpu-x86.S
+++ b/vm/cpu-x86.S
@@ -1,20 +1,21 @@
 DEF(F_FASTCALL void,c_to_factor,(CELL quot)):
 	PUSH_NONVOLATILE
-	push ARG0
-
-	/* Save stack pointer */
-	lea -CELL_SIZE(STACK_REG),ARG0      
+	mov ARG0,NV_TEMP_REG
 
 	/* Create register shadow area for Win64 */
-	sub $32,STACK_REG                    
+	sub $32,STACK_REG
+
+	/* Save stack pointer */
+	lea -CELL_SIZE(STACK_REG),ARG0
 	call MANGLE(save_callstack_bottom)
-	add $32,STACK_REG
 
 	/* Call quot-xt */
-	mov (STACK_REG),ARG0
+	mov NV_TEMP_REG,ARG0
 	call *QUOT_XT_OFFSET(ARG0)
 
-	pop ARG0
+	/* Tear down register shadow area */
+	add $32,STACK_REG
+
 	POP_NONVOLATILE
 	ret