diff --git a/collects/2htdp/info.ss b/collects/2htdp/info.ss
index a6b48e261c..3e1fe6961c 100644
--- a/collects/2htdp/info.ss
+++ b/collects/2htdp/info.ss
@@ -2,8 +2,4 @@
 
 (define name "HtDP/2e Teachpacks")
 (define compile-omit-paths
-  '("hangman-world.ss"
-    "hangman-world-play.ss"
-    "tests"
-    "extended-key"
-    "utest"))
+  '("tests" "uchat" "utest"))
diff --git a/collects/2htdp/private/check-aux.ss b/collects/2htdp/private/check-aux.ss
index 7584c5703b..a5b7a665b4 100644
--- a/collects/2htdp/private/check-aux.ss
+++ b/collects/2htdp/private/check-aux.ss
@@ -1,3 +1,4 @@
+
 #lang scheme
 
 (require htdp/error)
@@ -84,6 +85,7 @@
     [(string? x) true]
     [(symbol? x) true]
     [(number? x) true]
+    [(boolean? x) true]
     [(char? x) true]
     [(pair? x) (and (list? x) (andmap sexp? x))]
     [else false]))
diff --git a/collects/repos-time-stamp/stamp.ss b/collects/repos-time-stamp/stamp.ss
index 177bdd2835..d439d97551 100644
--- a/collects/repos-time-stamp/stamp.ss
+++ b/collects/repos-time-stamp/stamp.ss
@@ -1 +1 @@
-#lang scheme/base (provide stamp) (define stamp "8mar2010")
+#lang scheme/base (provide stamp) (define stamp "9mar2010")