I sent patches to SeaBIOS:
The first patch is boring (standards compliance in SeaBIOS's memset()) but a user on IRC today had trouble with their Nvidia GPU in a laptop.
They inserted the right option ROM, but named it with uppercase hex characters in the ROM name. SeaBIOS expects all-lowercase. 2nd patch makes SeaBIOS case insensitive when searching PCI ROMs by convention: pcivvvv,dddd.rom (v/d is vendor/device ID)
Quite an easy patch, really.