未捕获的异常：语法错误，无法识别的表达式：＃

I get this error on a .click() event in jQuery. I see it in Firebug. I use the latest version, 1.3.2 (min) The click fires an $.ajax() request for a Form in my website. I asked google about this and all he knows is "%" or "[@]" as unrecognized expressions, nothing about the "#".I get this error on a .click() event in jQuery.