Yesterday, I noticed some weird behaviour in Firefox. I have had an input field and a textarea formatted with CSS like:

input, textarea
{
    color: red;
    font-size: 0.8em;
}

If you look at this CSS, you would assume that a text you enter will look the same whether it is in the input field or the textarea. Well, with Konqueror, that is true. But with Firefox, it is different. It seems to me that by default different fonts are used for the two elements. So you have to specify the font family in the CSS:

input, textarea
{
    color: red;
    font-family: Verdana,Arial,Sans-serif;
    font-size: 0.8em;
}

And so it works with Firefox, too.