I've got a saphire 5850 reference and an Ati reference 5850 both can take voltages @ and above 1.15v. I've flashed both of my cards with an unlocked bios found in the Official 58XX thread in this forum.
I was pretty sure voltages above 1.15 weren't an issue with anyone else. I believe the Asus DirectCU is non reference as well but allows voltage adjustments and has no problems.

Man, the only thing good I've seen oughta MSI latley is the afterburner program..... Have you been to their "support" forums yet???
I have now! Yeah, i'm not impressed. I should have checked beforehand, but I've ran a few MSI mobos back in the day and usually they were pretty decent though not the best out there. I haven't used one for probably three or four years though.

And "their" Afterburner program is basically just a skinned Rivatuner, and Kombustor is Furmark.

Still haven't heard back from MSI yet. Hopefully they provide a fix soon. If it's even fixable!

I tried setting the 3D clocks with AMD GPU Tool so it would be in 3D mode before i upped the voltage with Afterburner (thought maybe it was a Powerplay issue, shutting down when it switched modes since it craps out as soon as i launch a 3D app and Afterburner only applies changes to the 3D clocks and voltage). It worked as far as keeping the card in 3D mode as Afterburner showed the 1.090 voltage as opposed to the 9.49 2D voltage. It made no difference with the problem i'm having though.