ADDITIONAL OS VERSION INFORMATION :
This applies for ALL the versions. The bug is only in the Javadoc. Verified with the online help

A DESCRIPTION OF THE PROBLEM :
This is part of the source file of the JTextArea:
 * <p>
 * <dt><b><font size=+1>Newlines</font></b>
 * <dd>
 * For a discussion on how newlines are handled, see
 * <a href="text/DefaultEditorKit.html">DefaultEditorKit</a>.
 * </dl>
 *

As you see, the content of the paragraph 'Newlines' is inside a <dd> section, but the section is never closed (a wrong '</dl>' tag is in place of the </dd> tag), causing the entire document to be shifted to the right.

STEPS TO FOLLOW TO REPRODUCE THE PROBLEM :
Open the Javadoc page:
http://java.sun.com/j2se/1.5.0/docs/api/javax/swing/JTextArea.html


REPRODUCIBILITY :
This bug can be reproduced always.