Web App Redeploy Memory Leak

Some of you may remember my on-going memory leak problem when re-deploying
my web app.

Scott said it might have been related to a JVM bug regarding primitive
arrays and JVMTI but this bug has now been fixed in 1.5.07 and still it was
happening.
http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=5093520

I have found the source of the bug anyway and it is in Resin (or I suppose 
Java's) DataSource code.

All my entity classes in my application extend from this base class

public class ConnectionBase {

    static Context ic;
    static DataSource ds;

    static {
        try {
            ic = new InitialContext();
            ds = (DataSource) ic.lookup("java:comp/env/jdbc/mysql");
        } catch (NamingException e) {
            throw new RuntimeException("Error getting database DataSource", 
e);
        }
    }

    protected static Connection getConnection() throws SQLException {
        return ds.getConnection();
    }
}

I call getConnection obviously to get a connection.

Now if I remove the DataSource code and instead use a java.sql.DriverManager 
lookup each time it works perfectly and all objects are garbage collected. I 
have not had to start Resin for 3 days on my development machine (when its 
normally every hour or so).