sorry, but knowing that other peoples opinion is not to update does'nt solve the problem. If we stick to that quality of answers, another one could be "why don't you use a Mac - using EFI?"
Well, according to the release notes it seems to make sense to update.
Source:
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/downloadDetail.jsp?soid=3302533&pf=true
Change History
Version 2.20 - 2012-01-23
Implemented the Intel specification for Intel Chipsets to improve stability. (Note: After updating to BIOS 2.20, downgrading to earlier versions will not be possible.)
Implemented a fix for an issue where the BIOS password cannot be entered when configured as follows: 1. Wired USB keyboard is connected to the port replicator. 2. Wireless USB mouse is connected to a computer USB port. 3. Computer is docked to the port replicator.
Improved: Dock power control while powered off to improve stability.
Improved: Local Boot processing from Linux PXE servers.
Improved: Event viewer error message when USB memory is inserted in the USB 3.0 port, then undocked in Windows XP.
Improved: Thermal control.
Improved: Control of TPM on Intel TXT enabled systems.
Implemented a fix for an issue where the BIOS password can't be entered with some USB keyboards.
Fixed: If the computer is undocked from the port replicator while transitioning to a sleep (Sx) state then re-docked, the computer cannot detect the port replicator after it is powered on.
Version 2.10 - 2011-04-01
Improved the control of the Virtualization Technology function.
Implemented the updated TPM specification for improved stability.
Version 2.10 - 2011-06-27
EC-V1.50: Improved: The battery is intermittently not charged while the computer is powered off. This occurs when the "Peak Shift" function is used.
Version 1.90 - 2011-03-01
Improved the BitLocker function - a BitLocker message was displayed after resuming from Hibernation.
Improved docker control - display positioning configuration was not retained when docked to a port replicator.
Version 1.80 - 2010-12-14
Improved DeployCenter 5.5 recovery speed.
Added support for the McAfee Endpoint Encryption eToken.
Added support for 2011 non-Windows models.
Implemented the INTEL specification for the Intel 5 Series Chipset to improve stability.
Implemented the INTEL specification for the Intel Core i7/i5/i3 Mobile Processor Series to improve stability.
Improved docker feature behavior - addresses missing undock Start Menu option in Windows 7.
Added support for the Paragon Backup & Recovery Suite.
Improved USB device recognition.