Index: /trunk/src/VBox/ValidationKit/testdriver/txsclient.py
===================================================================
--- /trunk/src/VBox/ValidationKit/testdriver/txsclient.py	(revision 79661)
+++ /trunk/src/VBox/ValidationKit/testdriver/txsclient.py	(revision 79662)
@@ -770,9 +770,9 @@
                         break;
                     if sInput:
-                        oStdIn.uTxsClientCrc32 = zlib.crc32(sInput, oStdIn.uTxsClientCrc32);
                         # Convert to a byte array before handing it of to sendMsg or the string
                         # will get some zero termination added breaking the CRC (and injecting
                         # unwanted bytes).
-                        abInput = array.array('B', sInput);
+                        abInput = array.array('B', sInput.encode('utf-8'));
+                        oStdIn.uTxsClientCrc32 = zlib.crc32(abInput, oStdIn.uTxsClientCrc32);
                         rc = self.sendMsg('STDIN', (long(oStdIn.uTxsClientCrc32 & 0xffffffff), abInput));
                         if rc is not True: