diff --git a/core/sm_stringutil.cpp b/core/sm_stringutil.cpp
index 2cb3bfef..13465750 100644
--- a/core/sm_stringutil.cpp
+++ b/core/sm_stringutil.cpp
@@ -1362,14 +1362,14 @@ char *sm_strdup(const char *str)
 	return ptr;
 }
 
-unsigned int UTIL_ReplaceAll(char *subject, size_t maxlength, const char *search, const char *replace)
+unsigned int UTIL_ReplaceAll(char *subject, size_t maxlength, const char *search, const char *replace, bool caseSensitive)
 {
 	size_t searchLen = strlen(search);
 	size_t replaceLen = strlen(replace);
 
 	char *ptr = subject;
 	unsigned int total = 0;
-	while ((ptr = UTIL_ReplaceEx(ptr, maxlength, search, searchLen, replace, replaceLen)) != NULL)
+	while ((ptr = UTIL_ReplaceEx(ptr, maxlength, search, searchLen, replace, replaceLen, caseSensitive)) != NULL)
 	{
 		total++;
 		if (*ptr == '\0')
@@ -1394,7 +1394,7 @@ unsigned int UTIL_ReplaceAll(char *subject, size_t maxlength, const char *search
  * bad buffer sizes.  Instead, this function will smartly cut off the 
  * string in a way that pushes old data out.
  */
-char *UTIL_ReplaceEx(char *subject, size_t maxLen, const char *search, size_t searchLen, const char *replace, size_t replaceLen)
+char *UTIL_ReplaceEx(char *subject, size_t maxLen, const char *search, size_t searchLen, const char *replace, size_t replaceLen, bool caseSensitive)
 {
 	char *ptr = subject;
 	size_t browsed = 0;
@@ -1414,7 +1414,7 @@ char *UTIL_ReplaceEx(char *subject, size_t maxLen, const char *search, size_t se
 		/* If the search matches and the replace length is 0, 
 		 * we can just terminate the string and be done.
 		 */
-		if (strcmp(subject, search) == 0 && replaceLen == 0)
+		if ((caseSensitive ? strcmp(subject, search) : strcasecmp(subject, search)) == 0 && replaceLen == 0)
 		{
 			*subject = '\0';
 			return subject;
@@ -1431,7 +1431,7 @@ char *UTIL_ReplaceEx(char *subject, size_t maxLen, const char *search, size_t se
 	while (*ptr != '\0' && (browsed <= textLen - searchLen))
 	{
 		/* See if we get a comparison */
-		if (strncmp(ptr, search, searchLen) == 0)
+		if ((caseSensitive ? strncmp(ptr, search, searchLen) : strncasecmp(ptr, search, searchLen)) == 0)
 		{
 			if (replaceLen > searchLen)
 			{
@@ -1507,7 +1507,7 @@ char *UTIL_ReplaceEx(char *subject, size_t maxLen, const char *search, size_t se
 				 * Search : BBB
 				 * Replace: D
 				 * OUTPUT : AADCCC
-				 * POSOTION:   ^
+				 * POSITION:   ^
 				 */
 				/* If the replacement does not grow the string length, we do not
 				 * need to do any fancy checking at all.  Yay!
diff --git a/core/sm_stringutil.h b/core/sm_stringutil.h
index 8c3a7f24..745ec198 100644
--- a/core/sm_stringutil.h
+++ b/core/sm_stringutil.h
@@ -57,8 +57,8 @@ bool gnprintf(char *buffer,
 size_t UTIL_Format(char *buffer, size_t maxlength, const char *fmt, ...);
 size_t UTIL_FormatArgs(char *buffer, size_t maxlength, const char *fmt, va_list ap);
 char *sm_strdup(const char *str);
-unsigned int UTIL_ReplaceAll(char *subject, size_t maxlength, const char *search, const char *replace);
-char *UTIL_ReplaceEx(char *subject, size_t maxLen, const char *search, size_t searchLen, const char *replace, size_t replaceLen);
+unsigned int UTIL_ReplaceAll(char *subject, size_t maxlength, const char *search, const char *replace, bool caseSensitive = true);
+char *UTIL_ReplaceEx(char *subject, size_t maxLen, const char *search, size_t searchLen, const char *replace, size_t replaceLen, bool caseSensitive = true);
 char *UTIL_TrimWhitespace(char *str, size_t &len);
 
 #endif // _INCLUDE_SOURCEMOD_STRINGUTIL_H_
diff --git a/core/smn_string.cpp b/core/smn_string.cpp
index e708280b..8cdfa8ad 100644
--- a/core/smn_string.cpp
+++ b/core/smn_string.cpp
@@ -491,24 +491,36 @@ static cell_t ReplaceString(IPluginContext *pContext, const cell_t *params)
 {
 	char *text, *search, *replace;
 	size_t maxlength;
+	bool caseSensitive;
 	
 	pContext->LocalToString(params[1], &text);
 	pContext->LocalToString(params[3], &search);
 	pContext->LocalToString(params[4], &replace);
 	maxlength = (size_t)params[2];
 
+	/* Account for old binary plugins that won't pass the last parameter */
+	if (params[0] == 5) 
+	{
+		caseSensitive = (bool)params[5];
+	}
+	else
+	{
+		caseSensitive = true;
+	}
+
 	if (search[0] == '\0')
 	{
 		return pContext->ThrowNativeError("Cannot replace searches of empty strings");
 	}
 
-	return UTIL_ReplaceAll(text, maxlength, search, replace);
+	return UTIL_ReplaceAll(text, maxlength, search, replace, caseSensitive);
 }
 
 static cell_t ReplaceStringEx(IPluginContext *pContext, const cell_t *params)
 {
 	char *text, *search, *replace;
 	size_t maxlength;
+	bool caseSensitive;
 
 	pContext->LocalToString(params[1], &text);
 	pContext->LocalToString(params[3], &search);
@@ -518,12 +530,22 @@ static cell_t ReplaceStringEx(IPluginContext *pContext, const cell_t *params)
 	size_t searchLen = (params[5] == -1) ? strlen(search) : (size_t)params[5];
 	size_t replaceLen = (params[6] == -1) ? strlen(replace) : (size_t)params[6];
 
+	/* Account for old binary plugins that won't pass the last parameter */
+	if (params[0] == 7)
+	{
+		caseSensitive = (bool)params[7];
+	}
+	else
+	{
+		caseSensitive = true;
+	}
+
 	if (searchLen == 0)
 	{
 		return pContext->ThrowNativeError("Cannot replace searches of empty strings");
 	}
 
-	char *ptr = UTIL_ReplaceEx(text, maxlength, search, searchLen, replace, replaceLen);
+	char *ptr = UTIL_ReplaceEx(text, maxlength, search, searchLen, replace, replaceLen, caseSensitive);
 
 	if (ptr == NULL)
 	{
diff --git a/plugins/include/string.inc b/plugins/include/string.inc
index 9ff75eed..11cba73f 100644
--- a/plugins/include/string.inc
+++ b/plugins/include/string.inc
@@ -284,9 +284,10 @@ native SplitString(const String:source[], const String:split[], String:part[], p
  * @param maxlength		Maximum length of the string buffer.
  * @param search		String to search for.
  * @param replace		String to replace the search string with.
+ * @param caseSensitive	If true (default), search is case sensitive.
  * @return				Number of replacements that were performed.
  */
-native ReplaceString(String:text[], maxlength, const String:search[], const String:replace[]);
+native ReplaceString(String:text[], maxlength, const String:search[], const String:replace[], bool:caseSensitive=true);
 
 /**
  * Given a string, replaces the first occurrence of a search string with a 
@@ -300,11 +301,12 @@ native ReplaceString(String:text[], maxlength, const String:search[], const Stri
  *						a strlen() call on the search parameter.
  * @param replaceLen	If higher than -1, its value will be used instead of
  *						a strlen() call on the replace parameter.
+ * @param caseSensitive	If true (default), search is case sensitive.
  * @return				Index into the buffer (relative to the start) from where
  *						the last replacement ended, or -1 if no replacements were
  *						made.
  */
-native ReplaceStringEx(String:text[], maxlength, const String:search[], const String:replace[], searchLen=-1, replaceLen=-1);
+native ReplaceStringEx(String:text[], maxlength, const String:search[], const String:replace[], searchLen=-1, replaceLen=-1, bool:caseSensitive=true);
 
 /** 
  * Returns the number of bytes a character is using.  This is