[jQuery] error with selector using jquery.ifixpng2.js and jquery v1.3.1

[jQuery] error with selector using jquery.ifixpng2.js and jquery v1.3.1


hi,
there comes an error with the following selector... i'm using
jquery.ifixpng2.js or (jquery.ifixpng.js) and jquery-1.3.1.min.js
$('img[@src$=.png]').ifixpng();
Exception... "'Syntax error, unrecognized expression: [@src$=.png]'
when calling method: [nsIDOMEventListener::handleEvent...
what is wrong with this selector?
best regards m from cologne