Whenever I\'m disconnected from the internet, I get the following exception:
org.hibernate.HibernateException: Could not parse configuration: com/mashlife/re
Alberto Daniel actually is right, indeed adding the "www." fixed for me the problem.
I guess, since the hibernate-core.jar file contains the dtd files, exactly the location http://www.hibernate.org/dtd/hibernate-configuration-3.0.dtd is treated somehow specially by the XML parser, so that the dtd from the jar file is used. I did not verify this, but it may be an explanation. However: Thank you Alberto!
Regards.