Bug 49005 Preference page doesn't get enough space to draw itself
200312162000 There are cases where the preference dialog doesn't allocate enough space for a page to draw itself. The width of the page seems to be a few pixels short.
bundles/org.eclipse.jface/src/org/eclipse/jface/preference/PreferenceDialog.java
public void setHelpAvailable(boolean b) {
		isHelpAvailable = b;
	}
	/**
	 * Set the message text. If the message line currently displays an error,
	 * the message is stored and will be shown after a call to clearErrorMessage
	 * <p>
	 * Shortcut for <code>setMessage(newMessage, NONE)</code>
	 * </p> 
	 * 
	 * @param newMessage the message, or <code>null</code> to clear
	 *   the message
	 */
	public void setMessage(String newMessage) {
		setMessage(newMessage, IMessageProvider.NONE);
	}
	/**
	 * Sets the message for this dialog with an indication of what type
	 * of message it is.
	 * <p>
	 * The valid message types are one of <code>NONE</code>, 
	 * <code>INFORMATION</code>, <code>WARNING</code>, or <code>ERROR</code>.
	 * </p>
	 * <p>
	 * Note that for backward compatibility, a message of type <code>ERROR</code> 
	 * is different than an error message (set using <code>setErrorMessage</code>). 
	 * An error message overrides the current message until the error message is 
	 * cleared. This method replaces the current message and does not affect the 
	 * error message.
	 * </p>