It was tested in an Asus TUV4X (the original flash is a Winbond W49F002U-12B).
Unfortunately this board uses the infamous AS99127F: http://www.flashrom.org/pipermail/flashrom/2010-February/002339.html
After "modprobe i2c-dev; i2cset 0 0x48 0x80 0x80" flashrom works normally and update both chips without problems. (didn't need to unload w83781d because I don't have lm-sensors installed here)
Log attached.
Regards,
Marcos