Version 4.1.2

applications/core/setup/upg_40000/checks.php

@@ -45,7 +45,7 @@ while ( $table = $tables->fetch_assoc() )
 
     $definition = \IPS\Db::i()->getTableDefinition( preg_replace( '/^' . $prefix . '/', '', $tableName ), FALSE, TRUE );
 
-    if( isset( $definition['collation'] ) AND mb_strtolower( mb_substr( $definition['collation'], 0, 4 ) !== 'utf8' ) )
+    if( isset( $definition['collation'] ) AND !in_array( $definition['collation'], array( 'utf8_unicode_ci', 'utf8mb4_unicode_ci' ) ) )
 	{
 		$convert = TRUE;
 		break;
@@ -55,7 +55,7 @@ while ( $table = $tables->fetch_assoc() )
 
 	while ( $column = $columns->fetch_assoc() )
 	{
-		if ( $column['Collation'] and mb_strtolower( mb_substr( $column['Collation'], 0, 4 ) !== 'utf8' ) )
+		if ( $column['Collation'] and !in_array( $column['Collation'], array( 'utf8_unicode_ci', 'utf8mb4_unicode_ci' ) ) )
 		{
 			$convert = TRUE;
 			break 2;