MyBB Community Forums

No, it isn't.

It's very very strange.

View it at:
forum.ps3killers.com

Link to your forum??

Yes, to view the blank white page.

Just the index page, if you go on portal it's normal.

What can I do?

Go into your Admin-CP -> Configuration -> Server- and Optimization Options and disable the Gzip compression. See if that works.

No. It's the same.

I have an idea... check your Guest settings and see what they say... as it only happens when you're not loggen in, it might be an issue with the Guest settings.

I don't think, because this happens just with index.php.

Is the entire page white, or are the header and footer etc there??

It is entire white. There isn't any code.

Click View > Source, and copy and paste what you see.