Not quite that simple.
When you use css buttons some javascript is added to the button. In this case the javascript adds a class when the hover happens and then removes the class when the hover stops.
Except in your case the class is not being removed because there is an error in the javascript.
To be brutally honest I can't be bothered to track down why but here is a work around. In your file stylesheet_css_buttons.css you find this line:
Code:
.cssButtonHover {
color: #e8b6eb;
border-style: inset;
text-decoration: none;
}
and change it to:
Code:
.cssButtonHover {
color: white;
border-style: inset;
text-decoration: none;
}
You won't have solved the javascript error but it will look better.