Martin,
I feel your pain, but it appears that 0.9 remains broken:
I believe having read somewhere on this forum that there are bigger fish to fry and that it will remain broken (with regard to syntax highlighting) for a while.
You may want to download the 0.8 version here:
https://hudson.eclipse.org/smarthome/job/SmartHomeDistribution-Nightly-0.8.x/
it does recognize all commands and provides auto-complete and syntax help with ctrl-space, etc
All the things that make my life as an amateur so much easier.