Like Linda I see the text wrapping as it approaches 50 characters in Firefox. The exception being when you have a single word longer than 50 characters when it doesn't want to break it.
Internet Explorer is more of a concern since, as Dr Byte has observed, the box is much wider and disappears behind the right hand column. This can be solved by removing the width setting from the textfield style> TEXTAREA {
float: left;
margin: auto;
display: block;
width: 95%;
}Unfortunately you'll only get a 48 character wide box as, unlike FF, IE doesn't make any allowance for the scroll bar, but I'm afraid that only Bill Gates can fix that one.