NGUI crash when is in web player but work inside editor

[pcutile]

NGUI crash in webplayer and text is showed blurred and button don't work, but inside unity3d editor works.
i use only ngui atlas as they are made

[ArenMook]

You need to provide a lot more details than that to go on in order for me to be able to help. None of the stock examples that come with NGUI cause any issues in the web player, and they all look crisp and work as expected.

Check the project's Quality settings in particular. "Fastest" quality target downgrades texture quality.

[ArenMook]

Buttons don't work because you forgot to check "Raycast Hit Triggers" option in physics.