With everyone's posts in here, this appears to be the list of incompatibility:
DX58SO
DX58SO2
DX68BC
DX79SI
I wonder what other variants and generations are effected by this issue.
I'm also disappointing to report that after contacting Intel, I was told that they aren't planning on making a new BIOS revisions. However, with how widespread this appears to be, I'm hoping that they will reconsider.