CrashPlan OK for Drobo?

I wonder if CrashPlan is really ok for Drobo? While it is on the DrobApps list in the Dashboard, pressing the “install” button there does not work. On CrashPlans website ( they say “Installing CrashPlan directly on a NAS device is unsupported. That means that our Customer Champions are unable to assist if you encounter any issues with this configuration.”

So, what’s the scoop?