diff --git a/doc/ikarus-users-guide.pdf b/doc/ikarus-users-guide.pdf
index f99ab15..0f3e2e4 100644
Binary files a/doc/ikarus-users-guide.pdf and b/doc/ikarus-users-guide.pdf differ
diff --git a/doc/ikarus-users-guide.tex b/doc/ikarus-users-guide.tex
index c763fb6..aa2914b 100644
--- a/doc/ikarus-users-guide.tex
+++ b/doc/ikarus-users-guide.tex
@@ -94,8 +94,7 @@
 \newcommand{\idxlabeldefun}[5]{
 \vspace{1ex}
 \rule{\textwidth}{2pt}
-{\index{#1@\texttt{#2}}\label{#3}{\Large\texttt{#4}} \hfill \textbf{#5}}\\
-}
+{\index{#1@\texttt{#2}}\label{#3}{\Large\texttt{#4}}\hfill\textbf{#5}}\\}
 
 
 \newcommand{\idxdefun}[3]{\idxlabeldefun{#1}{#2}{#1}{#2}{#3}}
@@ -524,8 +523,10 @@ example shows a very simple script that uses the
 \newpage
 
 \section{Installing Additional Libraries}
-
+FIXME
 \subsection{\texttt{IKARUS\_LIBRARY\_PATH}}
+\index{ikarus library path@\texttt{IKARUS\_LIBRARY\_PATH}}
+FIXME
 
 
 %\subsection{Mac OS X}
@@ -1148,11 +1149,20 @@ module system is similar in spirit to that of Chez Scheme.
 \defun{module}{syntax}
 \texttt{(module M definitions ... expressions ...)}\\
 \texttt{(module definitions ... expressions ...)}
+FIXME
 
 \defun{import}{syntax}
 \texttt{(import M)}
+FIXME
 
 \newpage
+\section{Local Library Imports}
+\defun{import}{syntax}
+\texttt{(import import-spec* ...)}
+FIXME
+
+\newpage
+
 \section{\label{sec:gensyms}Gensyms}
 
 Gensym stands for a \emph{generated symbol}---a fresh symbol that is
@@ -1241,12 +1251,14 @@ associated with the gensym argument.
 
 
 \idxdefun{gensym syntax}{\#\{gensym\}}{reader syntax}
+\texttt{\#\{unique-name\}}
 \index{\#\{pretty unique\}@\texttt{\#\{pretty unique\}} reader syntax}
+\\
+\texttt{\#\{pretty-name unique-name\}}
 \index{\#\{unique\}@\texttt{\#\{unique\}} reader syntax}
-\index{\#:pretty@\texttt{\#:pretty} reader syntax}
-\texttt{\#\{unique-name\}}\\
-\texttt{\#\{pretty-name unique-name\}}\\
+\\
 \texttt{\#:pretty-name}
+\index{\#:pretty@\texttt{\#:pretty} reader syntax}
 
 Ikarus's \texttt{read} and \texttt{write} procedures extends the
 lexical syntax of Scheme by the ability to read and write gensyms
@@ -1833,9 +1845,8 @@ string-normalize-nfkc               string-normalize-nfkd
 The following procedures are missing from \texttt{(rnrs arithmetic
 bitwise)}:
 \begin{Verbatim}
-bitwise-ior  bitwise-xor   bitwise-if 
+bitwise-ior  bitwise-xor   bitwise-if             bitwise-bit-field 
 bitwise-copy-bit-field     bitwise-bit-set?        bitwise-copy-bit 
-bitwise-first-bit-set      bitwise-bit-count      bitwise-bit-field 
 bitwise-reverse-bit-field  bitwise-rotate-bit-field  bitwise-length  
 \end{Verbatim}
 
@@ -1843,14 +1854,12 @@ bitwise-reverse-bit-field  bitwise-rotate-bit-field  bitwise-length
 The following procedures are missing from \texttt{(rnrs arithmetic
 fixnum)}:
 \begin{Verbatim}
-fxbit-count  fxbit-field  fxbit-set?  fxcopy-bit  fxcopy-bit-field
-fxfirst-bit-set fxlength  fxreverse-bit-field   fxrotate-bit-field   
+fxreverse-bit-field   fxrotate-bit-field   
 \end{Verbatim}
 
 
 The following procedures are missing from \texttt{(rnrs hashtables)}:
 \begin{Verbatim}
-hashtable-copy
 make-eqv-hashtable         make-hashtable
 hashtable-hash-function    hashtable-equivalence-function 
 equal-hash   string-hash   string-ci-hash   symbol-hash
@@ -1861,14 +1870,14 @@ equal-hash   string-hash   string-ci-hash   symbol-hash
 The following procedures are missing from \texttt{(rnrs io ports)}:
 \begin{Verbatim}
 call-with-bytevector-output-port     call-with-string-output-port
-binary-port?   textual-port?    port-eof?     
+binary-port?   textual-port?    port-eof?
 port-has-port-position?         port-position 
 port-has-set-port-position!?    set-port-position!
 call-with-port        close-port
 get-bytevector-all    get-bytevector-some
 get-bytevector-n      get-bytevector-n!
-get-char              put-char      lookahead-char    
-get-u8                lookahead-u8  put-u8
+lookahead-char
+lookahead-u8
 get-string-all        get-string-n  get-string-n!  put-string
 get-datum             put-datum
 make-custom-binary-input-port         make-custom-binary-input/output-port    
@@ -1876,7 +1885,6 @@ make-custom-binary-output-port        make-custom-textual-input-port
 make-custom-textual-input/output-port make-custom-textual-output-port
 open-bytevector-input-port            open-bytevector-output-port 
 open-file-input-port   open-file-input/output-port open-file-output-port    
-open-string-input-port open-string-output-port
 output-port-buffer-mode
 transcoded-port       port-transcoderput-bytevector 
 standard-error-port   standard-input-port   standard-output-port 
diff --git a/scheme/ikarus.boot.orig b/scheme/ikarus.boot.orig
index d28aa74..9577519 100644
Binary files a/scheme/ikarus.boot.orig and b/scheme/ikarus.boot.orig differ
diff --git a/scheme/ikarus.io-primitives.ss b/scheme/ikarus.io-primitives.ss
index 4878028..4f02b95 100644
--- a/scheme/ikarus.io-primitives.ss
+++ b/scheme/ikarus.io-primitives.ss
@@ -16,7 +16,7 @@
 
 (library (ikarus io-primitives)
   (export read-char unread-char peek-char write-char write-byte
-          put-u8 put-char get-char
+          put-u8 put-char get-char get-u8
           newline port-name input-port-name output-port-name
           close-input-port reset-input-port! 
           flush-output-port close-output-port get-line)
@@ -25,7 +25,7 @@
     (ikarus system $fx)
     (ikarus system $ports)
     (except (ikarus) read-char unread-char peek-char write-char write-byte 
-            put-u8 put-char get-char
+            put-u8 put-char get-char get-u8
             newline port-name input-port-name output-port-name
             close-input-port reset-input-port!  flush-output-port
             close-output-port get-line))
@@ -108,6 +108,12 @@
            ($read-char p)
            (error 'get-char "not an input-port" p))))
 
+  (define get-u8
+    (lambda (p) 
+      (if (input-port? p)
+           ($get-u8 p)
+           (error 'get-u8 "not an input-port" p))))
+
   (define read-char
     (case-lambda
       [() ($read-char (current-input-port))]
diff --git a/scheme/ikarus.io-primitives.unsafe.ss b/scheme/ikarus.io-primitives.unsafe.ss
index b4a49b0..d18b1cc 100644
--- a/scheme/ikarus.io-primitives.unsafe.ss
+++ b/scheme/ikarus.io-primitives.unsafe.ss
@@ -15,7 +15,7 @@
 
 
 (library (ikarus io-primitives unsafe)
-  (export $write-char $write-byte $read-char $unread-char $peek-char
+  (export $write-char $write-byte $read-char $get-u8 $unread-char $peek-char
           $reset-input-port! $flush-output-port 
           $close-input-port $close-output-port)
   (import
@@ -75,6 +75,15 @@
                 [else (($port-handler p) 'read-char p)]))
             (($port-handler p) 'read-char p)))))
 
+  (define $get-u8
+    (lambda (p)
+      (let ([idx ($port-index p)])
+        (if ($fx< idx ($port-size p))
+            (let ([b ($bytevector-u8-ref ($port-buffer p) idx)])
+              ($set-port-index! p ($fxadd1 idx))
+              b)
+            (($port-handler p) 'get-u8 p)))))
+
   (define $peek-char
     (lambda (p)
       (let ([idx ($port-index p)])
diff --git a/scheme/ikarus.io.input-files.ss b/scheme/ikarus.io.input-files.ss
index a354326..65f5434 100644
--- a/scheme/ikarus.io.input-files.ss
+++ b/scheme/ikarus.io.input-files.ss
@@ -125,6 +125,27 @@
                             (error 'read-char "Cannot read from file"
                                    port-name)]))
                        (error 'read-char "port is closed" p))))]
+            [(get-u8 p)
+             (unless (input-port? p)
+               (error 'get-u8 "not an input port" p))
+             (let ([idx ($port-index p)])
+               (if ($fx< idx ($port-size p))
+                   (let ([b ($bytevector-u8-ref ($port-buffer p) idx)])
+                      ($set-port-index! p ($fxadd1 idx))
+                      b)
+                   (if open?
+                       (let ([bytes
+                              (foreign-call "ikrt_read" 
+                                 fd ($port-buffer p))])
+                         (cond
+                           [($fx> bytes 0)
+                            ($set-port-size! p bytes)
+                            ($get-u8 p)]
+                           [($fx= bytes 0)
+                            (eof-object)]
+                           [else
+                            (error 'get-u8 "Cannot read from file" port-name)]))
+                       (error 'get-u8 "port is closed" p))))]
             [(peek-char p)
              (unless (input-port? p)
                (error 'peek-char "not an input port" p))
diff --git a/scheme/last-revision b/scheme/last-revision
index cca9df4..9437b2f 100644
--- a/scheme/last-revision
+++ b/scheme/last-revision
@@ -1 +1 @@
-1105
+1106
diff --git a/scheme/makefile.ss b/scheme/makefile.ss
index 0cd888c..89e2da0 100755
--- a/scheme/makefile.ss
+++ b/scheme/makefile.ss
@@ -1067,7 +1067,8 @@
     [get-string-all                              r ip]
     [get-string-n                                r ip]
     [get-string-n!                               r ip]
-    [get-u8                                      r ip]
+    [get-u8                                      i r ip]
+    [$get-u8                                     $io]
     [&i/o                                        i r ip is fi]
     [&i/o-decoding                               i r ip]
     [i/o-decoding-error?                         i r ip]
diff --git a/scheme/todo-r6rs.ss b/scheme/todo-r6rs.ss
index 9cf07a8..3a149bf 100755
--- a/scheme/todo-r6rs.ss
+++ b/scheme/todo-r6rs.ss
@@ -573,7 +573,7 @@
     [get-string-all                             S ip]
     [get-string-n                               S ip]
     [get-string-n!                              S ip]
-    [get-u8                                     S ip]
+    [get-u8                                     C ip]
     [&i/o                                       C ip is fi]
     [&i/o-decoding                              C ip]
     [i/o-decoding-error?                        C ip]
@@ -631,8 +631,8 @@
     [open-file-input-port                       S ip]
     [open-file-input/output-port                S ip]
     [open-file-output-port                      S ip]
-    [open-string-input-port                     S ip]
-    [open-string-output-port                    S ip]
+    [open-string-input-port                     C ip]
+    [open-string-output-port                    C ip]
     [output-port-buffer-mode                    S ip]
     [port-eof?                                  S ip]
     [port-has-port-position?                    S ip]