It is well known that using WhatPulse 2.x requires libc 2.14 on linux machines.
However, this is not merged in the squeeze release.
You have previously noted that “you would not fix this any time soon”. I really think that this is short sighted.
http://deimos-project.net/forums/showthread.php?tid=2006&pid=18212#pid18212
At least resupply the 1.2 client so that it becomes accessible…