Bug 32680 Print margin is in wrong location
Eclipse 2.1 (RC1) After changing my font to "Courier New", then turning on the Print Margin, I had to realize that it was located in the wrong place (off by some characters)
org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/javaeditor/JavaEditor.java
(LINE_NUMBER_COLOR.equals(property) || 
						PREFERENCE_COLOR_BACKGROUND_SYSTEM_DEFAULT.equals(property)  ||
						PREFERENCE_COLOR_BACKGROUND.equals(property))) {
					
					initializeLineNumberRulerColumn(fLineNumberRulerColumn);
			}
				
			if (isJavaEditorHoverProperty(property))
				updateHoverBehavior();
			
			if (BROWSER_LIKE_LINKS.equals(property)) {
				if (isBrowserLikeLinks())
					enableBrowserLikeLinks();
				else
					disableBrowserLikeLinks();
				return;
			}
			
		} finally {
			super.handlePreferenceStoreChanged(event);
		}
	}
	
	private boolean isJavaEditorHoverProperty(String property) {
		return	PreferenceConstants.EDITOR_TEXT_HOVER_MODIFIERS.equals(property);
	}
	
	/**
	 * Return whether the browser like links should be enabled
	 * according to the preference store settings.