diff --git a/scheme/ikarus.boot.prebuilt b/scheme/ikarus.boot.prebuilt
index d1a7ee9..8e252a9 100644
Binary files a/scheme/ikarus.boot.prebuilt and b/scheme/ikarus.boot.prebuilt differ
diff --git a/scheme/ikarus.cafe.ss b/scheme/ikarus.cafe.ss
index 857f49f..188660c 100644
--- a/scheme/ikarus.cafe.ss
+++ b/scheme/ikarus.cafe.ss
@@ -72,8 +72,8 @@ description:
             (lambda (con)
               (reset-input-port! (console-input-port))
               (flush-output-port (console-output-port))
-              (display "Unhandled exception\n" (console-output-port))
-              (print-condition con (console-output-port))
+              (display "Unhandled exception\n" (console-error-port))
+              (print-condition con (console-error-port))
               (k (void)))
             (lambda ()
               (display-prompt 0)
diff --git a/scheme/ikarus.exceptions.ss b/scheme/ikarus.exceptions.ss
index 35be597..3f6dcd9 100644
--- a/scheme/ikarus.exceptions.ss
+++ b/scheme/ikarus.exceptions.ss
@@ -29,8 +29,8 @@
     (make-parameter
       (list 
         (lambda (x) 
-          (display "Unhandled exception:\n" (standard-error-port))
-          (print-condition x)
+          (display "Unhandled exception:\n" (console-error-port))
+          (print-condition x (console-error-port))
           (exit -1)))))
   
   (define (with-exception-handler handler proc2)
diff --git a/scheme/ikarus.fasl.write.ss b/scheme/ikarus.fasl.write.ss
index a313521..96591ef 100644
--- a/scheme/ikarus.fasl.write.ss
+++ b/scheme/ikarus.fasl.write.ss
@@ -321,8 +321,7 @@
          (void))))
   (define fasl-write
     (case-lambda 
-      [(x) (fasl-write-to-port x (current-output-port))]
       [(x port)
-       (unless (output-port? port)
+       (unless (and (output-port? port) (binary-port? port))
          (error 'fasl-write "not an output port" port))
        (fasl-write-to-port x port)])))
diff --git a/scheme/ikarus.io.ss b/scheme/ikarus.io.ss
index d60000f..c4affe1 100644
--- a/scheme/ikarus.io.ss
+++ b/scheme/ikarus.io.ss
@@ -32,6 +32,7 @@
     current-output-port current-error-port
     open-file-output-port
     console-output-port
+    console-error-port
     console-input-port
     newline
     input-port-name
@@ -74,6 +75,7 @@
       open-file-output-port
       console-output-port
       console-input-port
+      console-error-port
       newline
       input-port-name
       output-port-name
@@ -1133,6 +1135,10 @@
     (let ([p (*the-output-port*)])
       (lambda () p)))
 
+  (define console-error-port
+    (let ([p (*the-error-port*)])
+      (lambda () p)))
+
   (define console-input-port
     (let ([p (*the-input-port*)])
       (lambda () p)))
diff --git a/scheme/last-revision b/scheme/last-revision
index c124326..f8d65c3 100644
--- a/scheme/last-revision
+++ b/scheme/last-revision
@@ -1 +1 @@
-1203
+1204
diff --git a/scheme/makefile.ss b/scheme/makefile.ss
index 86942a5..f3e1f67 100755
--- a/scheme/makefile.ss
+++ b/scheme/makefile.ss
@@ -345,6 +345,7 @@
     [with-output-to-string                       i]
     [with-output-to-bytevector                   i]
     [console-input-port                          i]
+    [console-error-port                          i]
     [console-output-port                         i]
     [reset-input-port!                           i]
     [write-byte                                  i]
@@ -1018,7 +1019,7 @@
     [raise-continuable                           i r ex]
     [with-exception-handler                      i r ex]
     [guard                                       i r ex]
-    [binary-port?                                r ip]
+    [binary-port?                                i r ip]
     [buffer-mode                                 i r ip]
     [buffer-mode?                                i r ip]
     [bytevector->string                          r ip]
@@ -1131,7 +1132,7 @@
     [native-eol-style                            i r ip]
     [native-transcoder                           i r ip]
     [transcoder?                                 i]
-    [open-bytevector-input-port                  r ip]
+    [open-bytevector-input-port                  i r ip]
     [open-bytevector-output-port                 i r ip]
     [open-file-input-port                        r ip]
     [open-file-input/output-port                 r ip]
@@ -1155,8 +1156,8 @@
     [standard-input-port                         i r ip]
     [standard-output-port                        i r ip]
     [string->bytevector                          r ip]
-    [textual-port?                               r ip]
-    [transcoded-port                             r ip]
+    [textual-port?                               i r ip]
+    [transcoded-port                             i r ip]
     [transcoder-codec                            i r ip]
     [transcoder-eol-style                        i r ip]
     [transcoder-error-handling-mode              i r ip]