diff --git a/configure b/configure
index 7fadba7c97..7492ed9644 100755
--- a/configure
+++ b/configure
@@ -1,5 +1,5 @@
 #! /bin/sh
-# From configure.in Id: configure.in 49053 2007-10-05 20:48:00Z RD .
+# From configure.in Id: configure.in 49605 2007-11-03 16:02:40Z PC .
 # Guess values for system-dependent variables and create Makefiles.
 # Generated by GNU Autoconf 2.59 for wxWidgets 2.8.6.
 #
@@ -12122,7 +12122,7 @@ echo "$as_me: error: Please specify at most one toolkit (maybe some are cached i
           fi
         fi
         if test "$value" = 1; then
-          toolkit_echo=`echo $toolkit | tr "[A-Z]" "[a-z]"`
+          toolkit_echo=`echo $toolkit | tr A-Z a-z`
           echo "$as_me:$LINENO: result: $toolkit_echo" >&5
 echo "${ECHO_T}$toolkit_echo" >&6
         fi
@@ -31455,7 +31455,7 @@ _ACEOF
         if test "$TOOLKIT" = "PM" ; then
         TOOLKIT_DIR="os2"
     else
-        TOOLKIT_DIR=`echo ${TOOLKIT} | tr "[A-Z]" "[a-z]"`
+        TOOLKIT_DIR=`echo ${TOOLKIT} | tr A-Z a-z`
     fi
 
     if test "$wxUSE_UNIVERSAL" = "yes"; then
@@ -32835,7 +32835,7 @@ if test "$wxUSE_DEBUG_INFO" = "yes"; then
     DEBUG_INFO=1
 fi
 
-WX_VERSION_TAG=`echo WX${lib_unicode_suffix}${lib_debug_suffix}${WX_LIB_FLAVOUR}_${WX_RELEASE} | tr "[a-z]" "[A-Z]"`
+WX_VERSION_TAG=`echo WX${lib_unicode_suffix}${lib_debug_suffix}${WX_LIB_FLAVOUR}_${WX_RELEASE} | tr a-z A-Z`
 
 TOOLCHAIN_NAME="${TOOLKIT_DIR}${TOOLKIT_VERSION}${WIDGET_SET}${lib_unicode_suffix}${lib_debug_suffix}${WX_LIB_FLAVOUR}-${WX_RELEASE}"
 
@@ -46449,7 +46449,7 @@ fi
 
 
 
-TOOLKIT_LOWERCASE=`echo $TOOLKIT | tr "[A-Z]" "[a-z]"`
+TOOLKIT_LOWERCASE=`echo $TOOLKIT | tr A-Z a-z`
 
 
 
@@ -46518,7 +46518,7 @@ else
 
                 if $CXX -o conftest$PROGRAM_EXT conftest.cpp >/dev/null 2>&1
                 then
-                    if tr -dc '[a-z]' < conftest$PROGRAM_EXT |
+                    if tr -dc a-z < conftest$PROGRAM_EXT |
                         grep awidetest >/dev/null
                     then
                         wx_cv_gcc_pch_bug=no
@@ -49822,7 +49822,7 @@ for subdir in `echo $SUBDIRS`; do
                     fi
                 done
             else
-                                                                disabled_var=DISABLED_`echo $subdir | tr [a-z] [A-Z]`;
+                                                                disabled_var=DISABLED_`echo $subdir | tr a-z A-Z`
                 eval "disabled=\$$disabled_var"
                 disabled=/`echo X $disabled | sed 's@ @/|/@g'`/
                 makefiles=`(cd $srcdir ; find $subdir -name Makefile.in) | $EGREP -v "$disabled"`
diff --git a/configure.in b/configure.in
index 623d0d5f14..826ce46a22 100644
--- a/configure.in
+++ b/configure.in
@@ -1465,7 +1465,7 @@ if test "$wxUSE_GUI" = "yes"; then
           fi
         fi
         if test "$value" = 1; then
-          toolkit_echo=`echo $toolkit | tr "[[A-Z]]" "[[a-z]]"`
+          toolkit_echo=`echo $toolkit | tr A-Z a-z`
           AC_MSG_RESULT($toolkit_echo)
         fi
       fi
@@ -4000,7 +4000,7 @@ libraries returned by 'pkg-config gtk+-2.0 --libs' or 'gtk-config
     if test "$TOOLKIT" = "PM" ; then
         TOOLKIT_DIR="os2"
     else
-        TOOLKIT_DIR=`echo ${TOOLKIT} | tr "[[A-Z]]" "[[a-z]]"`
+        TOOLKIT_DIR=`echo ${TOOLKIT} | tr A-Z a-z`
     fi
 
     if test "$wxUSE_UNIVERSAL" = "yes"; then
@@ -4409,7 +4409,7 @@ if test "$wxUSE_DEBUG_INFO" = "yes"; then
     DEBUG_INFO=1
 fi
 
-WX_VERSION_TAG=`echo WX${lib_unicode_suffix}${lib_debug_suffix}${WX_LIB_FLAVOUR}_${WX_RELEASE} | tr "[[a-z]]" "[[A-Z]]"`
+WX_VERSION_TAG=`echo WX${lib_unicode_suffix}${lib_debug_suffix}${WX_LIB_FLAVOUR}_${WX_RELEASE} | tr a-z A-Z`
 
 TOOLCHAIN_NAME="${TOOLKIT_DIR}${TOOLKIT_VERSION}${WIDGET_SET}${lib_unicode_suffix}${lib_debug_suffix}${WX_LIB_FLAVOUR}-${WX_RELEASE}"
 
@@ -8023,7 +8023,7 @@ AC_SUBST(UNICODE)
 AC_SUBST(BUILD)
 AC_SUBST(DEBUG_INFO)
 AC_SUBST(DEBUG_FLAG)
-TOOLKIT_LOWERCASE=`echo $TOOLKIT | tr "[[A-Z]]" "[[a-z]]"`
+TOOLKIT_LOWERCASE=`echo $TOOLKIT | tr A-Z a-z`
 AC_SUBST(TOOLKIT_LOWERCASE)
 AC_SUBST(TOOLKIT_VERSION)
 AC_SUBST(SAMPLES_RPATH_FLAG)
@@ -8093,7 +8093,7 @@ then
 
                 if $CXX -o conftest$PROGRAM_EXT conftest.cpp >/dev/null 2>&1
                 then
-                    if tr -dc '[a-z]' < conftest$PROGRAM_EXT |
+                    if tr -dc a-z < conftest$PROGRAM_EXT |
                         grep awidetest >/dev/null
                     then
                         wx_cv_gcc_pch_bug=no