Hi ... I have some problems with client ... It look like:

 

http://img11.imageshack.us/img11/1508/34262089.jpg

obviously its not client but your graphic card.. maybe drivers?

you can check if you reinstall and same thing happens..

Did this just start or has it always like this?

ok so... I've config the system and after I send it to friends to play...

at me work fine and they have this problems... after a long timpe of play in options one of my fix him terrains... anyone can send me default options at client ?

update graphic card driver and use a clean client...