[Graphics] Blur rendering (?) bug

[Landil]

Teeworlds user Pudding reports the following bug:

I discovered this little graphic-"bug" in 0.6.2 and also in 0.7.0. I don't know if it was there before, but if you look closely you will see it:

http://i.imgur.com/q7vykRR.png
(screen made in v.0.7.0)

As you can see here, the rifle is blurry if it is not 0°, 45°, 90°, 135°, ..., 315°. The same with shotgun.

http://i.imgur.com/Reo0SLR.png
(screen made in v.0.7.0)

For gun and grenade everything is fine.

http://i.imgur.com/oBosQoB.png
(screen made in v.0.7.0)

Hammer looks fine too, but Im not sure about armor and health. The outlines are not as clear as in the game.png.
It could be a problem with my 1366x768 resolution. Maybe someone else would like to check it.

https://www.teeworlds.com/forum/viewtopic.php?pid=106757#p106757

[regate]

It's blured on Linux with 1366x768 but not with 1920x1080, tested with 0.7 and 0.6.2