I'm having a problem with tags. They seam to work with the example foo.jsp as long as I leave the file alone. But if I cause the file to be updated, I get the following error in my browser window: Error: 500 Location: /examples/jsp/simpletag/foo.jsp No detailed message and this error in the stderr window: java.lang.NoSuchMethodError I'm not making any change to foo.jsp. I get this, for instance, if I load foo.jsp into Notepad, insert a space, then delete the space, then write the file back. Any ideas? Thanks, Tim