Cannot wake up my Ultra 6 with Wake-on-Lan (case #16131382)

I spent two months at the start of 2011 going back and forth with tech support trying to get WoL working consistently on a pair of Ultra 6es. Updated to the latest BIOS, even did a complete USB-stick-based reload of the firmware and re-initialization of the system, after which WoL worked properly (e.g., worked regardless of system shutdown method) for about a week. After that, it reverted to its usual behavior: works if the NAS was shut down using FrontView, but will not work if shutdown was scheduled in the power menu or was initiated using the front-panel button.

I was able to repeat this sequence of fixes twice on each of two boxes, with basically identical results.

Tech support was unable to provide any assistance other than the updated firmware image (and THAT took the better part of a week to winkle out of them, IIRC), though they had me open ports in my firewall and expose the NAS for remote diagnostics--during which time I was essentially NASless, as I didn't fancy leaving all my files on the system open to remote access. Despite multiple queries I was unable to determine if they ever actually looked at my system and/or discovered anything.

My other two 6-drive boxes--a Pro Business and a Pro Pioneer--both respond to WoL packets flawlessly, and always have.

The updated BIOS *did* make scheduled power-on work more consistently on the Ultra 6es, but failed to make WoL usable. I have become resigned to the fact that the Ultra 6es appear to be crippled in this aspect, though they are quite functional otherwise.