diff --git a/phpBB/includes/db/firebird.php b/phpBB/includes/db/firebird.php
index e554b0f2fb..6f60dd5dad 100644
--- a/phpBB/includes/db/firebird.php
+++ b/phpBB/includes/db/firebird.php
@@ -63,10 +63,19 @@ class dbal_firebird extends dbal
 	/**
 	* Version information about used database
 	* @param bool $raw if true, only return the fetched sql_server_version
+	* @param bool $use_cache forced to false for Interbase
 	* @return string sql server version
 	*/
-	function sql_server_info($raw = false)
+	function sql_server_info($raw = false, $use_cache = true)
 	{
+		/**
+		* force $use_cache false.  I didn't research why the caching code there is no caching code
+		* but I assume its because the IB extension provides a direct method to access it
+		* without a query.
+		*/
+
+		$use_cache = false;
+
 		if ($this->service_handle !== false && function_exists('ibase_server_info'))
 		{
 			return @ibase_server_info($this->service_handle, IBASE_SVC_SERVER_VERSION);
diff --git a/phpBB/includes/db/mssql.php b/phpBB/includes/db/mssql.php
index 7134574691..6899a73902 100644
--- a/phpBB/includes/db/mssql.php
+++ b/phpBB/includes/db/mssql.php
@@ -65,13 +65,14 @@ class dbal_mssql extends dbal
 	/**
 	* Version information about used database
 	* @param bool $raw if true, only return the fetched sql_server_version
+	* @param bool $use_cache If true, it is safe to retrieve the value from the cache
 	* @return string sql server version
 	*/
-	function sql_server_info($raw = false)
+	function sql_server_info($raw = false, $use_cache = true)
 	{
 		global $cache;
 
-		if (empty($cache) || ($this->sql_server_version = $cache->get('mssql_version')) === false)
+		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mssql_version')) === false)
 		{
 			$result_id = @mssql_query("SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY('productlevel'), SERVERPROPERTY('edition')", $this->db_connect_id);
 
@@ -84,7 +85,7 @@ class dbal_mssql extends dbal
 
 			$this->sql_server_version = ($row) ? trim(implode(' ', $row)) : 0;
 
-			if (!empty($cache))
+			if (!empty($cache) && $use_cache)
 			{
 				$cache->put('mssql_version', $this->sql_server_version);
 			}
diff --git a/phpBB/includes/db/mssql_odbc.php b/phpBB/includes/db/mssql_odbc.php
index 14c4831010..75a080b1b7 100644
--- a/phpBB/includes/db/mssql_odbc.php
+++ b/phpBB/includes/db/mssql_odbc.php
@@ -76,13 +76,14 @@ class dbal_mssql_odbc extends dbal
 	/**
 	* Version information about used database
 	* @param bool $raw if true, only return the fetched sql_server_version
+	* @param bool $use_cache If true, it is safe to retrieve the value from the cache
 	* @return string sql server version
 	*/
-	function sql_server_info($raw = false)
+	function sql_server_info($raw = false, $use_cache = true)
 	{
 		global $cache;
 
-		if (empty($cache) || ($this->sql_server_version = $cache->get('mssqlodbc_version')) === false)
+		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mssqlodbc_version')) === false)
 		{
 			$result_id = @odbc_exec($this->db_connect_id, "SELECT SERVERPROPERTY('productversion'), SERVERPROPERTY('productlevel'), SERVERPROPERTY('edition')");
 
@@ -95,7 +96,7 @@ class dbal_mssql_odbc extends dbal
 
 			$this->sql_server_version = ($row) ? trim(implode(' ', $row)) : 0;
 
-			if (!empty($cache))
+			if (!empty($cache) && $use_cache)
 			{
 				$cache->put('mssqlodbc_version', $this->sql_server_version);
 			}
diff --git a/phpBB/includes/db/mssqlnative.php b/phpBB/includes/db/mssqlnative.php
index 08ee70907c..98e22d4412 100644
--- a/phpBB/includes/db/mssqlnative.php
+++ b/phpBB/includes/db/mssqlnative.php
@@ -232,18 +232,19 @@ class dbal_mssqlnative extends dbal
 	/**
 	* Version information about used database
 	* @param bool $raw if true, only return the fetched sql_server_version
+	* @param bool $use_cache If true, it is safe to retrieve the value from the cache
 	* @return string sql server version
 	*/
-	function sql_server_info($raw = false)
+	function sql_server_info($raw = false, $use_cache = true)
 	{
 		global $cache;
 
-		if (empty($cache) || ($this->sql_server_version = $cache->get('mssql_version')) === false)
+		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mssql_version')) === false)
 		{
 			$arr_server_info = sqlsrv_server_info($this->db_connect_id);
 			$this->sql_server_version = $arr_server_info['SQLServerVersion'];
 
-			if (!empty($cache))
+			if (!empty($cache) && $use_cache)
 			{
 				$cache->put('mssql_version', $this->sql_server_version);
 			}
diff --git a/phpBB/includes/db/mysql.php b/phpBB/includes/db/mysql.php
index 0487dfa6d2..1e24c79577 100644
--- a/phpBB/includes/db/mysql.php
+++ b/phpBB/includes/db/mysql.php
@@ -96,13 +96,14 @@ class dbal_mysql extends dbal
 	/**
 	* Version information about used database
 	* @param bool $raw if true, only return the fetched sql_server_version
+	* @param bool $use_cache If true, it is safe to retrieve the value from the cache
 	* @return string sql server version
 	*/
-	function sql_server_info($raw = false)
+	function sql_server_info($raw = false, $use_cache = true)
 	{
 		global $cache;
 
-		if (empty($cache) || ($this->sql_server_version = $cache->get('mysql_version')) === false)
+		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mysql_version')) === false)
 		{
 			$result = @mysql_query('SELECT VERSION() AS version', $this->db_connect_id);
 			$row = @mysql_fetch_assoc($result);
@@ -110,7 +111,7 @@ class dbal_mysql extends dbal
 
 			$this->sql_server_version = $row['version'];
 
-			if (!empty($cache))
+			if (!empty($cache) && $use_cache)
 			{
 				$cache->put('mysql_version', $this->sql_server_version);
 			}
diff --git a/phpBB/includes/db/mysqli.php b/phpBB/includes/db/mysqli.php
index f0e58fd148..862d62f4ba 100644
--- a/phpBB/includes/db/mysqli.php
+++ b/phpBB/includes/db/mysqli.php
@@ -80,14 +80,14 @@ class dbal_mysqli extends dbal
 
 	/**
 	* Version information about used database
-	* @param bool $raw if true, only return the fetched sql_server_version
+	* @param bool $use_cache If true, it is safe to retrieve the value from the cache
 	* @return string sql server version
 	*/
-	function sql_server_info($raw = false)
+	function sql_server_info($raw = false, $use_cache = true)
 	{
 		global $cache;
 
-		if (empty($cache) || ($this->sql_server_version = $cache->get('mysqli_version')) === false)
+		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('mysqli_version')) === false)
 		{
 			$result = @mysqli_query($this->db_connect_id, 'SELECT VERSION() AS version');
 			$row = @mysqli_fetch_assoc($result);
@@ -95,7 +95,7 @@ class dbal_mysqli extends dbal
 
 			$this->sql_server_version = $row['version'];
 
-			if (!empty($cache))
+			if (!empty($cache) && $use_cache)
 			{
 				$cache->put('mysqli_version', $this->sql_server_version);
 			}
diff --git a/phpBB/includes/db/oracle.php b/phpBB/includes/db/oracle.php
index 55b3599800..25df029ea3 100644
--- a/phpBB/includes/db/oracle.php
+++ b/phpBB/includes/db/oracle.php
@@ -56,10 +56,18 @@ class dbal_oracle extends dbal
 	/**
 	* Version information about used database
 	* @param bool $raw if true, only return the fetched sql_server_version
+	* @param bool $use_cache forced to false for Oracle
 	* @return string sql server version
 	*/
-	function sql_server_info($raw = false)
+	function sql_server_info($raw = false, $use_cache = true)
 	{
+		/**
+		* force $use_cache false.  I didn't research why the caching code below is commented out
+		* but I assume its because the Oracle extension provides a direct method to access it
+		* without a query.
+		*/
+
+		$use_cache = false;
 /*
 		global $cache;
 
diff --git a/phpBB/includes/db/postgres.php b/phpBB/includes/db/postgres.php
index b3139b3d79..079419ff20 100644
--- a/phpBB/includes/db/postgres.php
+++ b/phpBB/includes/db/postgres.php
@@ -105,13 +105,14 @@ class dbal_postgres extends dbal
 	/**
 	* Version information about used database
 	* @param bool $raw if true, only return the fetched sql_server_version
+	* @param bool $use_cache If true, it is safe to retrieve the value from the cache
 	* @return string sql server version
 	*/
-	function sql_server_info($raw = false)
+	function sql_server_info($raw = false, $use_cache = true)
 	{
 		global $cache;
 
-		if (empty($cache) || ($this->sql_server_version = $cache->get('pgsql_version')) === false)
+		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('pgsql_version')) === false)
 		{
 			$query_id = @pg_query($this->db_connect_id, 'SELECT VERSION() AS version');
 			$row = @pg_fetch_assoc($query_id, null);
@@ -119,7 +120,7 @@ class dbal_postgres extends dbal
 
 			$this->sql_server_version = (!empty($row['version'])) ? trim(substr($row['version'], 10)) : 0;
 
-			if (!empty($cache))
+			if (!empty($cache) && $use_cache)
 			{
 				$cache->put('pgsql_version', $this->sql_server_version);
 			}
diff --git a/phpBB/includes/db/sqlite.php b/phpBB/includes/db/sqlite.php
index 288f6e0992..8de72fd394 100644
--- a/phpBB/includes/db/sqlite.php
+++ b/phpBB/includes/db/sqlite.php
@@ -50,19 +50,24 @@ class dbal_sqlite extends dbal
 	/**
 	* Version information about used database
 	* @param bool $raw if true, only return the fetched sql_server_version
+	* @param bool $use_cache if true, it is safe to retrieve the stored value from the cache
 	* @return string sql server version
 	*/
-	function sql_server_info($raw = false)
+	function sql_server_info($raw = false, $use_cache = true)
 	{
 		global $cache;
 
-		if (empty($cache) || ($this->sql_server_version = $cache->get('sqlite_version')) === false)
+		if (!$use_cache || empty($cache) || ($this->sql_server_version = $cache->get('sqlite_version')) === false)
 		{
 			$result = @sqlite_query('SELECT sqlite_version() AS version', $this->db_connect_id);
 			$row = @sqlite_fetch_array($result, SQLITE_ASSOC);
 
 			$this->sql_server_version = (!empty($row['version'])) ? $row['version'] : 0;
-			$cache->put('sqlite_version', $this->sql_server_version);
+
+			if (!empty($cache) && $use_cache)
+			{
+				$cache->put('sqlite_version', $this->sql_server_version);
+			}
 		}
 
 		return ($raw) ? $this->sql_server_version : 'SQLite ' . $this->sql_server_version;
diff --git a/phpBB/install/install_convert.php b/phpBB/install/install_convert.php
index 06c3a8b4a6..8c3ffd61a8 100644
--- a/phpBB/install/install_convert.php
+++ b/phpBB/install/install_convert.php
@@ -685,7 +685,7 @@ class install_convert extends module
 			// Thanks MySQL, for silently converting...
 			case 'mysql':
 			case 'mysql4':
-				if (version_compare($src_db->sql_server_info(true), '4.1.3', '>='))
+				if (version_compare($src_db->sql_server_info(true, false), '4.1.3', '>='))
 				{
 					$convert->mysql_convert = true;
 				}