So i've noticed this thing, when i got my new screen few weeks ago. When i play in fullscreen, everything is ok, but in windowed mode, i get black stripes on left and right side of the menu and in game, the chat and other HUD is moved towards the centre of the screen as well (while the track, car, etc. is rendered in there instead of the black stripes). Never had this issue before in windowed mode and it seems bit distracting. Now using 1920*1080 resolution.

Attached pictures for better illustration.

Windowed mode supports very limited screen ratio (seems no bigger then 16:9) - if you stretch the window wider,black bars will be added in sides both in menus and tv view while on track. In-car and follow views seems to be unaffected by stretching window too wide.

Yes, i've noticed that. I was just wondering, if there's some possibility of fixing that.