diff --git a/collects/drscheme/private/main.ss b/collects/drscheme/private/main.ss
index 5748249977..7ee10a072d 100644
--- a/collects/drscheme/private/main.ss
+++ b/collects/drscheme/private/main.ss
@@ -138,7 +138,7 @@
                            number-between-zero-and-one?))
 
 (preferences:set-default 'drscheme:module-browser:name-length 1 
-                         (λ (x) (memq x '(0 1 2))))
+                         (λ (x) (memq x '(0 1 2 3))))
 
 (let ([frame-width 600]
       [frame-height 650]
diff --git a/collects/drscheme/private/module-browser.ss b/collects/drscheme/private/module-browser.ss
index efcc57b997..9da23f68cb 100644
--- a/collects/drscheme/private/module-browser.ss
+++ b/collects/drscheme/private/module-browser.ss
@@ -113,6 +113,10 @@
                  dc-location-to-editor-location
                  find-snip
                  get-canvas)
+      
+        ;; require-depth-ht : hash[(list snip snip) -o> (listof integer)]
+        ;; maps parent/child snips (ie, those that match up to modules that require each other) to phase differences
+        (define require-depth-ht (make-hash))
         
         (define name-length 'long)
         (define/public (set-name-length nl)
@@ -192,11 +196,24 @@
           
           
           (set! max-lines #f)
-          
+          (compute-snip-require-phases)
           (remove-specially-linked)
           (render-snips)
           (end-edit-sequence))
         
+        (define/private (compute-snip-require-phases)
+          (let ([ht (make-hash)]) ;; avoid infinite loops 
+            (for ([snip (in-list (get-top-most-snips))])
+              (let loop ([parent snip]
+                         [depth 0])    ;; depth is either an integer or #f (indicating for-label)
+                (unless (hash-ref ht (cons parent depth) #f)
+                  (hash-set! ht (cons parent depth) #t)
+                  (send parent add-require-phase depth)
+                  (for ([child (in-list (send parent get-children))])
+                    (for ([delta-depth (in-list (hash-ref require-depth-ht (list parent child)))])
+                      (loop child 
+                            (and depth delta-depth (+ delta-depth depth))))))))))
+        
         ;; add-connection : string string (union symbol #f) number -> void
         ;; name-original and name-require and the identifiers for those paths and
         ;; original-filename? and require-filename? are booleans indicating if the names
@@ -210,6 +227,10 @@
                  [require-snip (find/create-snip name-require require-filename?)]
                  [original-level (send original-snip get-level)]
                  [require-level (send require-snip get-level)])
+            (let ([require-depth-key (list original-snip require-snip)])
+              (hash-set! require-depth-ht 
+                         require-depth-key
+                         (cons require-depth (hash-ref require-depth-ht require-depth-key '())))) 
             (case require-depth 
               [(0)
                (add-links original-snip require-snip
@@ -499,6 +520,13 @@
                     lines
                     pb)
         
+        (define require-phases '())
+        (define/public (add-require-phase d)
+          (unless (member d require-phases)
+            (set! last-name #f)
+            (set! last-size #f)
+            (set! require-phases (sort (cons d require-phases) < #:key (λ (x) (or x +inf.0))))))
+        
         (field [special-children (make-hasheq)])
         (define/public (is-special-key-child? key child)
           (let ([ht (hash-ref special-children key #f)])
@@ -591,7 +619,12 @@
                                             (cons (substring short-name 0 1)
                                                   (map (λ (x) (substring x 1 2))
                                                        ms)))])))))]
-                       [(long) word]))
+                       [(long) word]
+                       [(very-long)  
+                        (string-append
+                         word
+                         ": "
+                         (format "~s" require-phases))]))
                last-name])))
         
         (super-new)))
diff --git a/collects/drscheme/private/unit.ss b/collects/drscheme/private/unit.ss
index 9bae57887a..b2b67e6c6e 100644
--- a/collects/drscheme/private/unit.ss
+++ b/collects/drscheme/private/unit.ss
@@ -3225,7 +3225,8 @@ module browser threading seems wrong.
                        (label (string-constant module-browser-name-length))
                        (choices (list (string-constant module-browser-name-short)
                                       (string-constant module-browser-name-medium)
-                                      (string-constant module-browser-name-long)))
+                                      (string-constant module-browser-name-long)
+                                      (string-constant module-browser-name-very-long)))
                        (selection (preferences:get 'drscheme:module-browser:name-length))
                        (callback
                         (λ (x y)
@@ -3257,7 +3258,8 @@ module browser threading seems wrong.
                 (case i
                   [(0) 'short]
                   [(1) 'medium]
-                  [(2) 'long])))
+                  [(2) 'long]
+                  [(3) 'very-long])))
         
         (define/private (mouse-currently-over snips)
           (if (null? snips)
diff --git a/collects/scribblings/drscheme/interface-essentials.scrbl b/collects/scribblings/drscheme/interface-essentials.scrbl
index a80a896aa9..fbedebd94d 100644
--- a/collects/scribblings/drscheme/interface-essentials.scrbl
+++ b/collects/scribblings/drscheme/interface-essentials.scrbl
@@ -706,6 +706,32 @@ file cannot be included in another debugging session.
 
 @; ----------------------------------------------------------------------
 
+@section[#:tag "module-browser"]{The Module Browser}
+
+The module browser shows you the structure of all of the files in your program.
+It can be opened via the @onscreen{Show} menu, or via the @onscreen{Module Browser ...} 
+menu item in the @onscreen{Scheme} menu.
+
+A module browser window contains a square for each
+  module. The squares are colored based on the number of
+  lines of code in the module. If a module has more lines of
+  code, it gets a darker color.
+  
+  In addition, for each normal import, a blue line drawn is
+  from the module to the importing module. Similarly, purple
+  lines are drawn for each for-syntax, for-template or for-meta import. In the initial
+  module layout, modules to the left import modules to the
+  right, but since modules can be moved around
+  interactively, that property might not be preserved.
+
+  To open the file corresponding to the module, right-click or
+  control-click (Mac OS X) on the box for that module.
+  
+  The module browser will also show you the phases that each
+  module is loaded in; choose the ``Long, with phases'' menu item
+  in the ``Names'' popup menu. The integers indicate the phases and
+  if @scheme[#f] is present, it means the module is loaded @scheme[for-label].
+
 @section[#:tag "create-exe"]{Creating Executables}
 
 DrScheme's @onscreen{Create Executable...} menu item lets you create
diff --git a/collects/scribblings/drscheme/menus.scrbl b/collects/scribblings/drscheme/menus.scrbl
index acc88b6073..acdb664dce 100644
--- a/collects/scribblings/drscheme/menus.scrbl
+++ b/collects/scribblings/drscheme/menus.scrbl
@@ -195,9 +195,13 @@ appears at any time.
  @item{@defmenuitem{Hide Program Contour} Hides the contour window.}
    
  @item{@defmenuitem{Show Module Browser} Shows the module DAG rooted
-   at the currently opened file in DrScheme.}
+   at the currently opened file in DrScheme.
+   
+   See also @secref["module-browser"].}
 
- @item{@defmenuitem{Hide Module Browser} Hides the module browser.}
+ @item{@defmenuitem{Hide Module Browser} Hides the module browser.
+        
+          See also @secref["module-browser"].}
 
  @item{@defmenuitem{Toolbar} 
 @itemize[
@@ -300,20 +304,8 @@ background that signals the source location of an error.}
   then opens a window showing the module import structure
   for the module import DAG starting at the selected module.
   
-  The module browser window contains a square for each
-  module. The squares are colored based on the number of
-  lines of code in the module. If a module has more lines of
-  code, it gets a darker color.
-  
-  In addition, for each normal import, a blue line drawn is
-  from the module to the importing module. Similarly, purple
-  lines are drawn for each for-syntax import. In the initial
-  module layout, modules to the left import modules to the
-  right, but since modules can be moved around
-  interactively, that property might not be preserved.
-
-  To open the file corresponding to the module, right-click or
-  control-click (Mac OS X) on the box for that module.}
+  See also @secref["module-browser"].
+  }
 
  @item{@defmenuitem{Reindent} Indents the selected text according to
   the standard Scheme formatting conventions. (Pressing the Tab key
diff --git a/collects/string-constants/english-string-constants.ss b/collects/string-constants/english-string-constants.ss
index cccb684eba..c8511c7be4 100644
--- a/collects/string-constants/english-string-constants.ss
+++ b/collects/string-constants/english-string-constants.ss
@@ -1196,6 +1196,7 @@ please adhere to these guidelines:
  (module-browser-name-short "Short")
  (module-browser-name-medium "Medium")
  (module-browser-name-long "Long")
+ (module-browser-name-very-long "Long, with phases")  ;; like 'Long' but shows the phases where this file is loaded
  (module-browser-open-all "Open all files shown here")
 
  (happy-birthday-matthias "Happy Birthday, Matthias!")