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
StyledText text= viewer.getTextWidget();
				try {
					text.redrawRange(offset, length, true);
				} catch (IllegalArgumentException x) {
					JavaPlugin.log(x);
				}
			}
			
			fActiveRegion= null;
		}
				
		private IRegion selectWord(IDocument document, int anchor) {
		
			try {		
				int offset= anchor;
				char c;
	
				while (offset >= 0) {
					c= document.getChar(offset);
					if (!Character.isJavaIdentifierPart(c))
						break;
					--offset;
				}
	
				int start= offset;
	
				offset= anchor;
				int length= document.getLength();