m15/m17 R3, System BIOS 1.9.2

The other day, Alienware issued a new BIOS (1.9.2) for the m15 R3. It installed without issue, but I'm wondering what changes were included. This page provides "details" for the update, but I can't find anything that tells me what was actually changed. Does anyone know what was included in the update and why it was issued?