If you're using the stock cube, the old version of ArduCopter does not have the driver for the new version of the HERE, and it never will. So for the time being, stock cubes will require the older version of the HERE. If you're running Open Solo on the green cube, you have ArduCopter 3.5.4, and it has the driver for the new version of the HERE already. But, you would need to manually change the COMPASS_ORIENT parameter to something else since it is not 0 anymore. ArduCopter 3.5.5 has recently been released, and has that orientation fix baked into it, meaning the COMPASS_ORIENT parameter should be 0 again. This is **not** baked into Open Solo, and I haven't put 3.5.5 up on Solex or SidePilot yet. I'll make a point of doing that this weekend. I have a new HERE for testing and will be poking around to make sure it works as expected this weekend too
That said, the required slew rate protection will *probably* be added to ArduCopter master in the near future. That would allow everyone, stock or green, to run ArduCopter master and solve all our worldly problems. There is no date, but it's been discussed and likely to happen.