Syntax error, unrecognized expression: , $(selector).before(",");

I've been using this one line of code for a couple of years now with jQuery 1.2.6.

$("#acListTemp div.amenitiesDiv label").before(",");

I just upgraded to jQuery 1.6.1 and now it is giving me this error:

Syntax error, unrecognized expression: ,

I also tried this, but it yielded the same error:

theChar = ",";
$("#acListTemp div.amenitiesDiv label").before(theChar);

I checked the jQuery API page for the before command, but I'm still stumped. Any help is greatly appreciated!