diff --git a/collects/macro-debugger/syntax-browser/interfaces.ss b/collects/macro-debugger/syntax-browser/interfaces.ss
index 9c7ade2634..7c60b40af9 100644
--- a/collects/macro-debugger/syntax-browser/interfaces.ss
+++ b/collects/macro-debugger/syntax-browser/interfaces.ss
@@ -1,9 +1,33 @@
 #lang scheme/base
 (require scheme/class
          macro-debugger/util/class-iop
-         "../util/notify.ss")
+         (for-syntax scheme/base))
 (provide (all-defined-out))
 
+;; Helpers
+
+(define-for-syntax (join . args)
+  (define (->string x)
+    (cond [(string? x) x]
+          [(symbol? x) (symbol->string x)]
+          [(identifier? x) (symbol->string (syntax-e x))]
+          [else (error '->string)]))
+  (string->symbol (apply string-append (map ->string args))))
+
+;; not in notify.ss because notify depends on scheme/gui
+(define-interface-expander methods:notify
+  (lambda (stx)
+    (syntax-case stx ()
+      [(_ name ...)
+       (apply append
+              (for/list ([name (syntax->list #'(name ...))])
+                (list ;; (join "init-" #'name)
+                      (join "get-" name)
+                      (join "set-" name)
+                      (join "listen-" name))))])))
+
+;; Interfaces
+
 ;; config<%>
 (define-interface config<%> ()
   ((methods:notify suffix-option
diff --git a/collects/macro-debugger/util/notify.ss b/collects/macro-debugger/util/notify.ss
index 8da4293f64..991bce1263 100644
--- a/collects/macro-debugger/util/notify.ss
+++ b/collects/macro-debugger/util/notify.ss
@@ -16,9 +16,7 @@
          menu-option/notify-box
          menu-group/notify-box
          check-box/notify-box
-         choice/notify-box
-
-         methods:notify)
+         choice/notify-box)
 
 (define-for-syntax (join . args)
   (define (->string x)
@@ -74,19 +72,6 @@
                 (define/public-final (listen-name listener)
                   (send name listen listener))))]))
 
-
-(define-interface-expander methods:notify
-  (lambda (stx)
-    (syntax-case stx ()
-      [(_ name ...)
-       (apply append
-              (for/list ([name (syntax->list #'(name ...))])
-                (list ;; (join "init-" #'name)
-                      (join "get-" name)
-                      (join "set-" name)
-                      (join "listen-" name))))])))
-
-
 (define-syntax (connect-to-pref stx)
   (syntax-case stx ()
     [(connect-to-pref name pref)
diff --git a/collects/macro-debugger/view/interfaces.ss b/collects/macro-debugger/view/interfaces.ss
index d5d75aad3f..4c7ddae67f 100644
--- a/collects/macro-debugger/view/interfaces.ss
+++ b/collects/macro-debugger/view/interfaces.ss
@@ -1,23 +1,22 @@
 
 #lang scheme/base
 (require macro-debugger/util/class-iop
-         "../util/notify.ss"
          (prefix-in sb: "../syntax-browser/interfaces.ss"))
 (provide (all-defined-out))
 
 (define-interface config<%> (sb:config<%>)
-  ((methods:notify macro-hiding-mode
-                   show-hiding-panel?
-                   identifier=?
-                   highlight-foci?
-                   highlight-frontier?
-                   show-rename-steps?
-                   suppress-warnings?
-                   one-by-one?
-                   extra-navigation?
-                   debug-catch-errors?
-                   force-letrec-transformation?
-                   split-context?)))
+  ((sb:methods:notify macro-hiding-mode
+                      show-hiding-panel?
+                      identifier=?
+                      highlight-foci?
+                      highlight-frontier?
+                      show-rename-steps?
+                      suppress-warnings?
+                      one-by-one?
+                      extra-navigation?
+                      debug-catch-errors?
+                      force-letrec-transformation?
+                      split-context?)))
 
 (define-interface widget<%> ()
   (get-config
diff --git a/collects/scheme/private/class-internal.ss b/collects/scheme/private/class-internal.ss
index 3b92501f73..a6ae8f06ee 100644
--- a/collects/scheme/private/class-internal.ss
+++ b/collects/scheme/private/class-internal.ss
@@ -2958,7 +2958,7 @@
 			       (obj-error who "no such field: ~a~a"
 					  name
 					  (for-class (class-name class)))))])
-      (which (cwhich (car p)) (cdr p))))
+      (which (cwhich (car p)) (cdr p) name)))
   
   (define (make-class-field-accessor class name)
     (class-field-X 'class-field-accessor
diff --git a/collects/scribblings/gui/style-list-class.scrbl b/collects/scribblings/gui/style-list-class.scrbl
index b9eef1351f..3aa9361ace 100644
--- a/collects/scribblings/gui/style-list-class.scrbl
+++ b/collects/scribblings/gui/style-list-class.scrbl
@@ -73,11 +73,15 @@ The @scheme[base-style] argument must be a style within this style
 
 Creates a new derived style, or finds an appropriate existing one.
 The returned style is always unnamed.  See @|stylediscuss| for more
-information. 
+information.
 
-The @scheme[base-style] argument must be a style within this style list.
-
-}
+The @scheme[base-style] argument must be a style within this style
+list.  If @scheme[base-style] is not a join style, if it has no name,
+and if its delta can be collapsed with @scheme[delta] (see
+@xmethod[style-delta% collapse]), then the collapsed delta is used in
+place of @scheme[delta], and the base style of @scheme[base-style] is
+used in place of @scheme[base-style]; this collapsing and substitution
+of base styles is performed recursively.}
 
 
 @defmethod[(forget-notification [key any/c])
diff --git a/collects/teachpack/universe.png b/collects/teachpack/universe.png
new file mode 100644
index 0000000000..ed161af097
Binary files /dev/null and b/collects/teachpack/universe.png differ