size limit of pictures in signatures

I got some help a couple of months ago with limiting the size of pictures in signatures.
And Anykillien suggested to do this in CSS. I did and it worked perfectly for a while. But now it doesn't seem to work anymore. Do we need to do something else since the new upgrades/recent problems to limit the size of pictures in signatures?


This was the info given before:
Now go to your Admin CP > Display > Colors > CSS.
Add this code there and submit...

Code:
.signature img {
max-height : 10px;
max-width : 20px;
}



You can edit the values of maximum height and width as per your need.

Have you tried adding the code back into the CSS?

It's still there. Can you have more than one line tho as I've come up with my own code (just followed the example) for avatars. I'll try delete it and insert it again.

Is it something to do with the latest problems we had or not?