Club Penguin Small Login Changes

Club Penguin has made some very small changes to the login procedure. First off, you might notice this small box that appears briefly:

Now when you put your mouse over the start button, you may have notice some tweaks were made to it. Here’s what it looks like now:

This is what it looked like before:

As you can see, they minorly changed the text and animation of how the  button acts. Nothing major, but I wonder why they did this?