Korbinian, thanks for the feedback.
For the former bug (a commercial-oriented issue), the generaly
recommendation is to open up a bug report as a commercial customer and
it will get fixed in a patch release or wait until a release of
GlassFish release is delivered. That being said, stay tuned on this
one. We'll look into it.
As for the latter, sincere apologies on the backwards compatibility
issue. Looks like a fix was pushed out.