2.9.1200 is released on 07-May-12 whereas 2.9.8350 is released on 07-Dec-11?
In addition 2.9.1200 release notes mentions 2 bugs fixed:
"
PCIe FunctionLevelReset occasionally failed when the driver was down
VMware driver failed to load when attached to Virtual Function one
"
whereas 2.9.8350 release notes mantions nothing related to FLR/virtualization.
So that's why I didn't try the 2.9.8350 FW, although the number seems higher...maybe I missed some information somewhere?