[Avodah] dropping tzistzis after Shema

[shalomyitz at comcast.net]

Does anyone know why after Shema in the morning we let go of our tzistizs davka between "l'ad" and "ul'olimay olamim"? 
Why specifically there? 

Thanks, 

Steve 
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.aishdas.org/pipermail/avodah-aishdas.org/attachments/20110913/ca470f08/attachment.htm>