I've been using the javax.crypto package for several months with no
incident.  However, starting yesterday, my applications suddenly fail
with the exception noted in the subject.  There must be something very
wrong with my installation, because even this trivial program fails:

import javax.crypto.Cipher;
public class Main
{
   public static void main(String[] args)
   {
       try
       {
           Cipher.getInstance("Blowfish");
       }
       catch (Exception e)
       {
           e.printStackTrace();
       }
   }
}

It says: "Cannot find any provider supporting Blowfish".  I'm using
jdk-1.5.0_01 with Eclipse 3.0.1.  I also had the 1.5 jre installed as
well, but I uninstalled it to see if that made any difference.  My
java.security file is the default, and appears to specify all the
normal security providers.  I also have j2ee installed, but I don't see
why that should cause any problems.  Any help would be appreciated.

Dave