I had to update an old batch file to discover this bug, which was introduced in going from version 12 to version 13. In the ECHOS and the ECHOSERR commands using %=r or ^r (assuming caret is the escape character) is supposed to move the cursor back to the left margin, allowing repeated overwriting. Up to V12.11 this worked. Starting with V13 the musical one-eighth note is displayed, which is the original IBM glyph for ASCII 13, the carriage return. I did not check whether or not the other escapable characters function as documented.