A bit more information would be nice :-)
Operating System?
Graphic Card?
...etc
This problem is really not common.
Maybe add a clean client.log? (remove the old one, start the game, shutdown the client)
Post it here in a Spoiler:
[spoiler=chat.log]Content[/spoiler]
Is the Problem always there, or only in some area?
Maybe you have a heating problem with your GPU? (Some GPUs have this strange behavior sometimes)
...
I guess you understood :-) Without information, nobody can help.
Operating System?
Graphic Card?
...etc
This problem is really not common.
Maybe add a clean client.log? (remove the old one, start the game, shutdown the client)
Post it here in a Spoiler:
[spoiler=chat.log]Content[/spoiler]
Is the Problem always there, or only in some area?
Maybe you have a heating problem with your GPU? (Some GPUs have this strange behavior sometimes)
...
I guess you understood :-) Without information, nobody can help.