First off, sorry for not being able to answer your question, my Mini is still in shipping...
But, may I make a guess about this relating to sound cards and compatibility?
If so, I just thought I'd mention that a lot of the "compatible with chip <x>" recommendations manufacturers put out is usually about running the audio interfaces in Windows.
There still are incompatibilities with certain sound cards and Mac when run with specific firewire chipsets, however the issues are not so easy that one can point to the chip alone but it is usually a combination of the firewire driver stack together with the chip. Thus, a chip causing issues for a audio interface under Windows might (and generally do) work better when combined with OS X instead.
Edit: Also worth thinking off is that the option to use the Thunderbolt->FireWire adapter is available...