[P/O W. 'Moggy' Cattermole]

Looks like anti-alising (sp?) issues. If you switch it on or increase it, it smooths out those pixelations but is a bit heavier on the ol' graphics card. With IL2, there's no AA settings to play with in game, you need to switch it on manually using your graphics cotrol panel eg ATI catalyst control centre or Nvidia's equivilent.