[jQuery] Re: an unusual bug. addClass to td inside tr with a class doesn't affect the cell

[MorningZ]

The problem isn't with jQuery, it's with your CSS

fire up that example page in Firefox with Firebug's "Inspect" tab open
and you'll see "dblred" get applied and removed just fine

but you'll also see in the "style" pane that this "dblred" class is
getting superceeded by the mess of other classes involved

to avoid all this conflict, you can either

1) Clean up your CSS

or

2) This works
$(document).ready(function() {
                $(".tick td").hover(
                function() {
                        $(this).css("background-color", "#c00");
                    },
                function() {
                    $(this).css("background-color", "");
                }
            );
});