trouble with textedit appends

toneguy's icon

I am experiencing different results when sending the append message to a textedit object. On a 2-year-old Macbook Pro, the message behaves as expected. But on a 4-year-old iMac, append actually appears to prepend the text. These machines are running the same OS version and the same versions of MaxMSP.
I realize this is a long shot, but has anyone experienced the same behavior and sorted out how to work around it?