I'm working on GNU Classpath, which uses the w3c DOM java binding.
In our nightly API comparisons, we see a difference between the
DOM code we ship and the code in the JDK; see:

http://www.kaffe.org/~stuart/japi/htmlout/h-jdk14-classpath.html#err_minor_org_w3c_dom

The problem is that the serialVersionUID differs; presumably the reason
is that this depends on the compiler used to create the class file.  It is
most reliable to explicitly declare this field.  I'm attaching a patch to fix
this problem.

Having this patch in the upstream sources would help us get to 100% API
compatibility without requiring any local changes to code we don't maintain.