This is an absolutely reproducible Autosync bug with Fireface 800

Setup:

COMPUTER #1
Asus Laptop PC
Window 7 64 bit
Nuendo 5.5 64 bit
Babyface: Driver 21.06.11, vr 0.984, HW 184

COMPUTER #2
Mac Pro 1,1
OSX 10.6.8
Fireface 800: 2.93, 2.77 (Dual daisy chained via FW800)

Babyface (PC) connects ADAT (optical out: SPDIF) to master Fireface (mac) ADAT input #2 where "preferred sync" reference is SPDIF, "SPDIF input" is set to ADAT2, and "clock mode" is set to Autosync. Remember there is a second Fireface hanging off the master set to autosync word clock input from master. No other digital audio connections are made to any fireface 800's.

Repro:
1) MAC: Set Fireface master to 44.1 via RME settings app
2) PC: create 44.1 Nuendo session 
3) PC: set main output of Nuendo to Babyface AS1/2
4) PC: create a MONO channel
5) PC: insert the Steinberg Test Generation plugin onto the MONO track
6) PC: select WHITE NOISE as source in test gen plugin
-  PC: use digicheck to verify *mono* white noise is sending from Babyface AS1/2
7) MAC: show RME fireface settings
-  Mac: RME "system clock" should read 44.1
-  MAC: digicheck scope to verify *mono* white noise is at master Fireface 800 ADAT input 1/2
8) PC: change Nuendo sample rate from 44.1 to 48k
-  PC: use digicheck to verify *mono* white noise is sending from Babyface AS1/2
-  MAC: RME "system clock" should now read 48k, as well SPDIF in and autosync reference
-  MAC: digicheck to verify *mono* white noise is at master Fireface 800 ADAT input 1/2
9) PC: change Nuendo sample rate from 48k to 88k
-  PC: use digicheck to verify *mono* white noise is sending from Babyface AS1/2
BUG - MAC: RME "system clock" should now read 88k but it currently reads 44.1k, SPDIF in and autosync reference reads 88k
-  MAC: use digicheck to verify *mono* white noise is at master Fireface 800 ADAT input 1/2
BUG - digicheck shows incoming white noise as "stereo" even though mono is sent. Somehow the incoming signal is distorted to  be stereo

Workaround:
10) MAC: manually change mac RME sample rate to 88k using RME settings app
-  MAC: use digicheck scope to verify *mono* white noise is at master Fireface 800 ADAT input 1/2
-  now incoming white noise is "mono"

Autosync in not changing system to proper clock and is not handling incoming SPDIF signal properly!

This issue is completely reproducible. I would love to call tech support if needed or even video tape a demo of the issue. Please respond to this post and I'll call in.

I've had other issues reported here http://www.rme-audio.de/forum/viewtopic.php?id=11170 when trying to change sample rates on the mac. Perhaps they are related.

Thanks much!
Ryan