The FS76 has both a 100hz mode and a 50hz mode.
You can select in the user menu which mode you want the picture to be displayed in (either DRC50 or DRC100).
My friend has an FS70, which is a very similar tv, and the DRC50 mode (which is 50hz for PAL, and 60hz for NTSC) is easily better than the 100hz setting, especially with region 1 dvds.
The 50hz setting on the FS76 is very different to the way that a conventional tv shows a 50hz image.
The refresh rate may be the same (50hz), but the number of scan lines are doubled. An NTSC picture, that is normally made up of 480 scan lines, will be shown on this set as 960 lines.
Hope this helps,
Bob.