It seems that Far Cry 2 doesn't render in native widescreen, and instead crops the image into a 16:9 format. This issue was also present in Bioshock, but was later patched.

Spotted by the same group that found the problem with BioShock, WidescreenGaming has discovered that the game instead crops off the top and bottom of the screen when displayed on a 16:9 display. The result is that you see even less of the game than you might on a standard sized screen.

Not too long ago, BioShock was found to have the same fault and this was one of many flaws that soured fans against the game. Well, that and copy-protection - but Ubisoft have been transparent on that front and admitted that they are using the same DRM solution as BioShock.

2K Games eventually released a patch for the widescreen issue that made the game render properly in widescreen. We can only hope that Ubisoft will do the same, though hopefully quicker than 2K did.