Firefox truncating web pages

[user1]

I am using ubuntu 10.10 and icecat (firefox variant) 3.6.13

When I open this link http://askubuntu.com/ in firefox some text get cut.

When I open the same link in google chrome everything is okay.

I have met the same problem before, when I tried to do a visa payment, I 
had to switch to google chrome to make the payment work - a payment 
formular was cut when using firefox.