diff --git a/MasterPassword/C/build b/MasterPassword/C/build
index 2c06e2a2..948e779a 100755
--- a/MasterPassword/C/build
+++ b/MasterPassword/C/build
@@ -39,7 +39,7 @@ else
 fi
 
 # Optional features.
-mpw_color=0 # Colorized Identicon, requires libncurses-dev
+mpw_color=1 # Colorized Identicon, requires libncurses-dev
 
 
 ### DEPENDENCIES
diff --git a/MasterPassword/C/mpw-algorithm_v0.c b/MasterPassword/C/mpw-algorithm_v0.c
index 28eefb3e..fb9f46a1 100644
--- a/MasterPassword/C/mpw-algorithm_v0.c
+++ b/MasterPassword/C/mpw-algorithm_v0.c
@@ -38,7 +38,8 @@ static const char mpw_characterFromClass_v0(char characterClass, uint16_t seedBy
 static const uint8_t *mpw_masterKeyForUser_v0(const char *fullName, const char *masterPassword) {
 
     const char *mpKeyScope = mpw_scopeForVariant( MPSiteVariantPassword );
-    trc( "fullName: %s\n", fullName );
+    trc( "algorithm: v%d\n", 0 );
+    trc( "fullName: %s (%zu)\n", fullName, mpw_charlen( fullName ) );
     trc( "masterPassword: %s\n", masterPassword );
     trc( "key scope: %s\n", mpKeyScope );
 
@@ -72,6 +73,7 @@ static const char *mpw_passwordForSite_v0(const uint8_t *masterKey, const char *
         const MPSiteVariant siteVariant, const char *siteContext) {
 
     const char *siteScope = mpw_scopeForVariant( siteVariant );
+    trc( "algorithm: v%d\n", 0 );
     trc( "siteName: %s\n", siteName );
     trc( "siteCounter: %d\n", siteCounter );
     trc( "siteVariant: %d\n", siteVariant );
diff --git a/MasterPassword/C/mpw-algorithm_v1.c b/MasterPassword/C/mpw-algorithm_v1.c
index 925e02bb..55159e7e 100644
--- a/MasterPassword/C/mpw-algorithm_v1.c
+++ b/MasterPassword/C/mpw-algorithm_v1.c
@@ -22,7 +22,8 @@
 static const uint8_t *mpw_masterKeyForUser_v1(const char *fullName, const char *masterPassword) {
 
     const char *mpKeyScope = mpw_scopeForVariant( MPSiteVariantPassword );
-    trc( "fullName: %s\n", fullName );
+    trc( "algorithm: v%d\n", 1 );
+    trc( "fullName: %s (%zu)\n", fullName, mpw_charlen( fullName ) );
     trc( "masterPassword: %s\n", masterPassword );
     trc( "key scope: %s\n", mpKeyScope );
 
@@ -56,6 +57,7 @@ static const char *mpw_passwordForSite_v1(const uint8_t *masterKey, const char *
         const MPSiteVariant siteVariant, const char *siteContext) {
 
     const char *siteScope = mpw_scopeForVariant( siteVariant );
+    trc( "algorithm: v%d\n", 1 );
     trc( "siteName: %s\n", siteName );
     trc( "siteCounter: %d\n", siteCounter );
     trc( "siteVariant: %d\n", siteVariant );
diff --git a/MasterPassword/C/mpw-algorithm_v2.c b/MasterPassword/C/mpw-algorithm_v2.c
index 935b5016..2d019dbe 100644
--- a/MasterPassword/C/mpw-algorithm_v2.c
+++ b/MasterPassword/C/mpw-algorithm_v2.c
@@ -22,7 +22,8 @@
 static const uint8_t *mpw_masterKeyForUser_v2(const char *fullName, const char *masterPassword) {
 
     const char *mpKeyScope = mpw_scopeForVariant( MPSiteVariantPassword );
-    trc( "fullName: %s\n", fullName );
+    trc( "algorithm: v%d\n", 2 );
+    trc( "fullName: %s (%zu)\n", fullName, mpw_charlen( fullName ) );
     trc( "masterPassword: %s\n", masterPassword );
     trc( "key scope: %s\n", mpKeyScope );
 
@@ -56,6 +57,7 @@ static const char *mpw_passwordForSite_v2(const uint8_t *masterKey, const char *
         const MPSiteVariant siteVariant, const char *siteContext) {
 
     const char *siteScope = mpw_scopeForVariant( siteVariant );
+    trc( "algorithm: v%d\n", 2 );
     trc( "siteName: %s\n", siteName );
     trc( "siteCounter: %d\n", siteCounter );
     trc( "siteVariant: %d\n", siteVariant );
diff --git a/MasterPassword/C/mpw-algorithm_v3.c b/MasterPassword/C/mpw-algorithm_v3.c
index bd1feeb4..bfb22532 100644
--- a/MasterPassword/C/mpw-algorithm_v3.c
+++ b/MasterPassword/C/mpw-algorithm_v3.c
@@ -22,7 +22,8 @@
 static const uint8_t *mpw_masterKeyForUser_v3(const char *fullName, const char *masterPassword) {
 
     const char *mpKeyScope = mpw_scopeForVariant( MPSiteVariantPassword );
-    trc( "fullName: %s\n", fullName );
+    trc( "algorithm: v%d\n", 3 );
+    trc( "fullName: %s (%zu)\n", fullName, strlen( fullName ) );
     trc( "masterPassword: %s\n", masterPassword );
     trc( "key scope: %s\n", mpKeyScope );
 
@@ -56,6 +57,7 @@ static const char *mpw_passwordForSite_v3(const uint8_t *masterKey, const char *
         const MPSiteVariant siteVariant, const char *siteContext) {
 
     const char *siteScope = mpw_scopeForVariant( siteVariant );
+    trc( "algorithm: v%d\n", 3 );
     trc( "siteName: %s\n", siteName );
     trc( "siteCounter: %d\n", siteCounter );
     trc( "siteVariant: %d\n", siteVariant );
diff --git a/MasterPassword/C/mpw-tests.c b/MasterPassword/C/mpw-tests.c
index 8755bd59..7f4c8981 100644
--- a/MasterPassword/C/mpw-tests.c
+++ b/MasterPassword/C/mpw-tests.c
@@ -21,6 +21,7 @@ int main(int argc, char *const argv[]) {
 
         // Read in the test case.
         xmlChar *id = mpw_xmlTestCaseString( testCase, "id" );
+        uint32_t algorithm = mpw_xmlTestCaseInteger( testCase, "algorithm" );
         xmlChar *fullName = mpw_xmlTestCaseString( testCase, "fullName" );
         xmlChar *masterPassword = mpw_xmlTestCaseString( testCase, "masterPassword" );
         xmlChar *keyID = mpw_xmlTestCaseString( testCase, "keyID" );
@@ -36,16 +37,20 @@ int main(int argc, char *const argv[]) {
 
         // Run the test case.
         fprintf( stdout, "test case %s... ", id );
+        if (!xmlStrlen( result )) {
+            fprintf( stdout, "abstract.\n" );
+            continue;
+        }
 
         // 1. calculate the master key.
         const uint8_t *masterKey = mpw_masterKeyForUser(
-                (char *)fullName, (char *)masterPassword, MPAlgorithmVersionCurrent );
+                (char *)fullName, (char *)masterPassword, algorithm );
         if (!masterKey)
             ftl( "Couldn't derive master key." );
 
         // 2. calculate the site password.
         const char *sitePassword = mpw_passwordForSite(
-                masterKey, (char *)siteName, siteType, siteCounter, siteVariant, (char *)siteContext, MPAlgorithmVersionCurrent );
+                masterKey, (char *)siteName, siteType, siteCounter, siteVariant, (char *)siteContext, algorithm );
         mpw_free( masterKey, MP_dkLen );
         if (!sitePassword)
             ftl( "Couldn't derive site password." );
@@ -56,7 +61,7 @@ int main(int argc, char *const argv[]) {
 
         else {
             ++failedTests;
-            fprintf( stdout, "FAILED!  (result %s != expected %s)\n", result, sitePassword );
+            fprintf( stdout, "FAILED!  (got %s != expected %s)\n", sitePassword, result );
         }
 
         // Free test case.
diff --git a/MasterPassword/C/mpw-util.c b/MasterPassword/C/mpw-util.c
index c9042359..3bc072cb 100644
--- a/MasterPassword/C/mpw-util.c
+++ b/MasterPassword/C/mpw-util.c
@@ -8,9 +8,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
-#include <stdbool.h>
 #include <string.h>
-#include <locale.h>
 
 #ifdef COLOR
 #include <unistd.h>
@@ -111,7 +109,7 @@ const char *mpw_hex(const void *buf, size_t length) {
 #ifdef COLOR
 static int putvari;
 static char *putvarc = NULL;
-static bool istermsetup = false;
+static int istermsetup = 0;
 static void initputvar() {
     if (putvarc)
         free(putvarc);
@@ -172,8 +170,33 @@ const char *mpw_identicon(const char *fullName, const char *masterPassword) {
     return identicon;
 }
 
-const size_t mpw_charlen(const char *string) {
+/**
+* @return the amount of bytes used by UTF-8 to encode a single character that starts with the given byte.
+*/
+static int mpw_charByteSize(unsigned char utf8Byte) {
 
-    setlocale( LC_ALL, "en_US.UTF-8" );
-    return mbstowcs( NULL, string, strlen( string ) );
+    if (!utf8Byte)
+        return 0;
+    if ((utf8Byte & 0x80) == 0)
+        return 1;
+    if ((utf8Byte & 0xC0) != 0xC0)
+        return 0;
+    if ((utf8Byte & 0xE0) == 0xC0)
+        return 2;
+    if ((utf8Byte & 0xF0) == 0xE0)
+        return 3;
+    if ((utf8Byte & 0xF8) == 0xF0)
+        return 4;
+
+    return 0;
+}
+
+const size_t mpw_charlen(const char *utf8String) {
+
+    size_t charlen = 0;
+    char *remainingString = (char *)utf8String;
+    for (int charByteSize; (charByteSize = mpw_charByteSize( *remainingString )); remainingString += charByteSize)
+        ++charlen;
+
+  return charlen;
 }
diff --git a/MasterPassword/C/mpw-util.h b/MasterPassword/C/mpw-util.h
index 52ba5f99..8c5db151 100644
--- a/MasterPassword/C/mpw-util.h
+++ b/MasterPassword/C/mpw-util.h
@@ -75,4 +75,5 @@ const char *mpw_identicon(const char *fullName, const char *masterPassword);
 
 //// String utilities.
 
-const size_t mpw_charlen(const char *string);
+/** @return The amount of display characters in the given UTF-8 string. */
+const size_t mpw_charlen(const char *utf8String);