diff --git a/Engine/source/afx/arcaneFX.cpp b/Engine/source/afx/arcaneFX.cpp
index 8ec0e9760..cec0c870a 100644
--- a/Engine/source/afx/arcaneFX.cpp
+++ b/Engine/source/afx/arcaneFX.cpp
@@ -908,7 +908,7 @@ ConsoleFunction(echoThru, const char*, 2, 0, "(string passthru, string text...)"
    char *ret = Con::getReturnBuffer(len + 1);
    ret[0] = 0;
    for(i = 2; i < argc; i++)
-      dStrcat(ret, argv[i], len);
+      dStrcat(ret, argv[i], len + 1);
 
    Con::printf("%s -- [%s]", ret, argv[1].getStringValue());
    ret[0] = 0;
@@ -928,7 +928,7 @@ ConsoleFunction(warnThru, const char*, 2, 0, "(string passthru, string text...)"
    char *ret = Con::getReturnBuffer(len + 1);
    ret[0] = 0;
    for(i = 2; i < argc; i++)
-      dStrcat(ret, argv[i], len);
+      dStrcat(ret, argv[i], len + 1);
 
    Con::warnf("%s -- [%s]", ret, argv[1].getStringValue());
    ret[0] = 0;
@@ -948,7 +948,7 @@ ConsoleFunction(errorThru, const char*, 2, 0, "(string passthru, string text...)
    char *ret = Con::getReturnBuffer(len + 1);
    ret[0] = 0;
    for(i = 2; i < argc; i++)
-      dStrcat(ret, argv[i], len);
+      dStrcat(ret, argv[i], len + 1);
 
    Con::errorf("%s -- [%s]", ret, argv[1].getStringValue());
    ret[0] = 0;
diff --git a/Engine/source/app/badWordFilter.cpp b/Engine/source/app/badWordFilter.cpp
index d789bc1c4..0a13a9c29 100644
--- a/Engine/source/app/badWordFilter.cpp
+++ b/Engine/source/app/badWordFilter.cpp
@@ -287,7 +287,7 @@ DefineEngineFunction(filterString, const char *, (const char* baseString, const
       replaceStr = gBadWordFilter->getDefaultReplaceStr();
 
    char *ret = Con::getReturnBuffer(dStrlen(baseString) + 1);
-   dStrcpy(ret, baseString, dStrlen(baseString));
+   dStrcpy(ret, baseString, dStrlen(baseString) + 1);
    gBadWordFilter->filterString(ret, replaceStr);
    return ret;
 }
diff --git a/Engine/source/console/SimXMLDocument.cpp b/Engine/source/console/SimXMLDocument.cpp
index 4071ae138..156533503 100644
--- a/Engine/source/console/SimXMLDocument.cpp
+++ b/Engine/source/console/SimXMLDocument.cpp
@@ -833,7 +833,7 @@ void SimXMLDocument::setObjectAttributes(const char* objectID)
             continue;
 
          FrameTemp<char> valCopy( dStrlen( val ) + 1 );
-         dStrcpy( (char *)valCopy, val, dStrlen(val) + 1 );
+         dStrcpy( (char *)valCopy, val, valCopy.size() );
 
          if (!pObject->writeField(itr->pFieldname, valCopy))
             continue;
@@ -873,7 +873,7 @@ void SimXMLDocument::setObjectAttributes(const char* objectID)
    //      continue;
 
    //   FrameTemp<char> valCopy( dStrlen( val ) + 1 );
-   //   dStrcpy( (char *)valCopy, val, dStrlen(val) + 1 );
+   //   dStrcpy( (char *)valCopy, val, valCopy.size() );
 
    //   if (!pObject->writeField(itr->pFieldname, valCopy))
    //      continue;
diff --git a/Engine/source/console/console.cpp b/Engine/source/console/console.cpp
index fd5d343d2..be472f197 100644
--- a/Engine/source/console/console.cpp
+++ b/Engine/source/console/console.cpp
@@ -2176,8 +2176,8 @@ bool expandPath(char* pDstPath, U32 size, const char* pSrcPath, const char* pWor
       }
 
       // Format the output path.
-      dStrcat(pathBuffer, "/", sizeof(pathBuffer) - 1 - strlen(pathBuffer));
-      dStrcat(pathBuffer, pSrc, sizeof(pathBuffer) - 1 - strlen(pathBuffer));
+      dStrncat(pathBuffer, "/", sizeof(pathBuffer) - 1 - strlen(pathBuffer));
+      dStrncat(pathBuffer, pSrc, sizeof(pathBuffer) - 1 - strlen(pathBuffer));
 
       // Are we ensuring the trailing slash?
       if (ensureTrailingSlash)
diff --git a/Engine/source/console/persistenceManager.cpp b/Engine/source/console/persistenceManager.cpp
index df2dd8b01..56812cd4b 100644
--- a/Engine/source/console/persistenceManager.cpp
+++ b/Engine/source/console/persistenceManager.cpp
@@ -967,10 +967,10 @@ void PersistenceManager::updateToken( const U32 lineNumber, const U32 linePositi
 
    // Build the new line with the
    // preString + newValue + postString
-   dStrcat(newLine, preString, newLineLen);
+   dStrcat(newLine, preString, newLineLen + 1);
    if ( newValue )
-      dStrcat(newLine, newValue, newLineLen);
-   dStrcat(newLine, postString, newLineLen);
+      dStrcat(newLine, newValue, newLineLen + 1);
+   dStrcat(newLine, postString, newLineLen + 1);
 
    // Clear our existing line
    if (mLineBuffer[lineNumber])
diff --git a/Engine/source/gui/editor/guiEditCtrl.cpp b/Engine/source/gui/editor/guiEditCtrl.cpp
index 571d1df84..bf20e8568 100644
--- a/Engine/source/gui/editor/guiEditCtrl.cpp
+++ b/Engine/source/gui/editor/guiEditCtrl.cpp
@@ -2625,8 +2625,8 @@ DefineConsoleMethod( GuiEditCtrl, getSelectionGlobalBounds, const char*, (), , "
    RectI bounds = object->getSelectionGlobalBounds();
    String str = String::ToString( "%i %i %i %i", bounds.point.x, bounds.point.y, bounds.extent.x, bounds.extent.y );
    
-   char* buffer = Con::getReturnBuffer( str.length() );
-   dStrcpy( buffer, str.c_str(), str.length() );
+   char* buffer = Con::getReturnBuffer( str.size() );
+   dStrcpy( buffer, str.c_str(), str.size() );
    
    return buffer;
 }
diff --git a/Engine/source/platformWin32/winFileio.cpp b/Engine/source/platformWin32/winFileio.cpp
index 83b7e1859..3e1974ae4 100644
--- a/Engine/source/platformWin32/winFileio.cpp
+++ b/Engine/source/platformWin32/winFileio.cpp
@@ -158,8 +158,7 @@ bool dPathCopy(const char *fromName, const char *toName, bool nooverwrite)
 
       Platform::clearExcludedDirectories();
 
-      S32 tempBufSize = to.size * 3 + MAX_PATH * 3;
-      TempAlloc< char > tempBuf( tempBufSize );
+      TempAlloc< char > tempBuf( to.size * 3 + MAX_PATH * 3 );
 
       // Create all the directories.
       for (S32 i = 0; i < directoryInfo.size(); i++)
@@ -169,7 +168,7 @@ bool dPathCopy(const char *fromName, const char *toName, bool nooverwrite)
          char* toDir = tempBuf;
          Platform::makeFullPathName(fromDir + dStrlen(fromName) + (dStricmp(fromDir, fromName) ? 1 : 0), tempBuf, tempBuf.size, toName);
          if(*(toDir + dStrlen(toDir) - 1) != '/')
-            dStrcat(toDir, "/", tempBufSize);
+            dStrcat(toDir, "/", tempBuf.size);
          forwardslash(toDir);
 
          if (!Platform::createPath(toDir))
@@ -192,8 +191,8 @@ bool dPathCopy(const char *fromName, const char *toName, bool nooverwrite)
 
          char* toFile = tempBuf;
          Platform::makeFullPathName(fileInfo[i].pFullPath + dStrlen(fromName) + (dStricmp(fileInfo[i].pFullPath, fromName) ? 1 : 0), tempBuf, tempBuf.size, toName);
-         dStrcat(toFile, "/", tempBufSize);
-         dStrcat(toFile, fileInfo[i].pFileName, tempBufSize);
+         dStrcat(toFile, "/", tempBuf.size);
+         dStrcat(toFile, fileInfo[i].pFileName, tempBuf.size);
 
          backslash(fromFile);
          backslash(toFile);