jQuery getScript –语法错误

I dynamically load a JavaScript file using jQuery's $.getScript() method. The FireFox console always tells me that there is a "syntax error" in the first line. However, the script proceeds to work just fine. The first line is nothing but

function SomeFunc (param) {

as it is the start of a class. Adding a dummy class to the beginning of the file, like this:

function Dummy () {
    return false;
}

... it shows the syntax error for the first line (function Dummy () {). Does anyone know what's causing this?

Thanks in advance!