pt-sift disables echo on OS X if there is a single timestamp
On a system with this info:
Darwin telecaster.local 11.4.0 Darwin Kernel Version 11.4.0: Mon Apr 9 19:32:15 PDT 2012; root:xnu-
GNU bash, version 3.2.48(1)-release (x86_64-
Copyright (C) 2007 Free Software Foundation, Inc.
If I run pt-sift (as obtained just now from percona.
If I run the script with two or more captures, I don't have this problem. I have been able to reproduce this with multiple captures but just in case (as I couldn't find one in the tests directory) I will be attaching a sample capture that can be used to reproduce this problem on a similar system.
I haven't tested this on other platforms yet.