This can happen with certain graphics display drivers on web pages that have fixed background images.

Make sure that you have the latest driver for your graphics display card.

You can try a bookmarklet like this on such pages to make the image scrollable.

javascript:void(document.body.style.backgroundAttachment='scroll');

Well my friend, thnx for reply. I don't think is the graphic display card because I don't have a problem with other browser such as IE.

I've installed Greasemonkey with fixed background remover (script) and its working just fine. I hope it mantains this way because I've heard this kind of problems tend to come back... I dunno.

Anyway, can you pls explain how to do the bookmarklet javascript?

That other programs (browsers) are not affected doesn't tell much. Each program uses different API calls and may not be affected by this problem with the graphics display driver.

I assume that your Greasemonkey script does a similar thing and may either remove the background or change the fixed behavior fixed to scroll.

While you are on the web page, paste the full bookmarklet text to the location bar and press the Enter key to run the bookmarklet code.
You can also create a new bookmark and paste the bookmarklet text in the location field.
You can turn the bookmarklet code into a Greasemonkey script and run it on pages that cause the scroll problem.

See http://en.wikipedia.org/wiki/Bookmarklet

Yah I assume Greasemonkey script is working. Scrolling is quite better in that particular page but is not as other sites wich has similar gif's/ads etc... I think it could be better.

I did copy/paste/enter the bookmarklet in the location bar but didn't see much of a difference... it stay the same way. Maybe I did something wrong.

Sorry for asking again, but could you guide me in how to create bookmark and paste bookmarklet text in the location field?