diff --git a/README.md b/README.md
index 269c08c7..bec9de20 100644
--- a/README.md
+++ b/README.md
@@ -8,7 +8,7 @@
 ```
 > git clone git://github.com/gansm/finalcut.git
 > cd finalcut
-> ./configure --prefix=/usrX
+> ./configure --prefix=/usr
 > make
 > su -c "make install"
 ```
diff --git a/scripts/profile.sh b/scripts/profile.sh
index 036fcf3b..49e083c5 100755
--- a/scripts/profile.sh
+++ b/scripts/profile.sh
@@ -1,11 +1,11 @@
 #!/bin/bash
 
 DIR="$PWD"
-cd ../test/.libs/
+cd ../test/.libs/ || exit
 LD_LIBRARY_PATH=../../src/.libs/ ./ui
 gprof ./ui >./profile.txt
 rm ./gmon.out
 less ./profile.txt
 rm ./profile.txt
-cd "$DIR"
+cd "$DIR" || exit
 
diff --git a/scripts/show_graph_font.sh b/scripts/show_graph_font.sh
index cc5cb4e7..f22288e2 100755
--- a/scripts/show_graph_font.sh
+++ b/scripts/show_graph_font.sh
@@ -1,4 +1,3 @@
 #!/bin/bash
 xfd -center -columns 16 -fn -misc-8x16graph-medium-r-normal--17-160-75-75-*-80-iso8859-1
 
-
diff --git a/src/fonts/bdf2c.sh b/src/fonts/bdf2c.sh
index 0f1c6abc..0286e1e2 100755
--- a/src/fonts/bdf2c.sh
+++ b/src/fonts/bdf2c.sh
@@ -14,12 +14,12 @@ FONTFILE="8x16graph.bdf"
   | tr '\n' ',' \
   | sed -e 's/BITMAP,//g' \
   | sed -e 's/--,/\n/g' \
-  | tr '[A-Z]' '[a-z]' \
+  | tr '[:upper:]' '[:lower:]' \
   | sed -e 's/,/, /g' \
   | sed -e 's/\([0-9a-f][0-9a-f]\)/0x\1/g' \
   | sed -e 's/^0/  0/g' \
   | sed -e '$s/, $/  \n/' \
-  | while IFS=$'\n'; read LINE
+  | while IFS=$'\n'; read -r LINE
   do
     echo "$LINE /* $N */"
     let N++
diff --git a/src/fonts/font2c.sh b/src/fonts/font2c.sh
index e685c961..584f45d0 100755
--- a/src/fonts/font2c.sh
+++ b/src/fonts/font2c.sh
@@ -13,7 +13,7 @@ FONTFILE="8x16std"
   | sed -e 's/ {$/\n{/' \
   | sed -e 's/^unsigned/static unsigned/' \
   | sed -e '/len = /d' \
-  | while IFS=$'\n'; read LINE
+  | while IFS=$'\n'; read -r LINE
   do
     if [ "${LINE:0:1}" != " " ]
     then