Minor Weird Graphical Bug

[ElectroBlueGuy]

Whenever i join the server, the graphics looks more pixellated than they should be, and moving causes some Lag, i'm using the latest Beta build and switching to the Stable build has no effect, just 2 weeks ago everything was fine.
I also checked for viruses on my Pc but no results.

Switch out of 58x58 mode to stretch-to-fit, top left of screen, icons button.

I'm already in stretch-to-fit, and i don't see a 58x58 mode, only 32x32, 56x56, and 64x64