It's best to report this kind of problem in the right place, where developers can actually read about the protocol problems; you will of course also need to deal with your distro which needs to roll out new packages -- basically, protocol changes are a real pain in the nadgers to deal with because they don't follow a release cycle.
So. The right place for this kind of reports is the kdenetwork mailing list (ooh, I can't find one) or the kopete-devel mailing list (
https://mail.kde.org/mailman/listinfo/kopete-devel ) .