Scrollbars does not display in Firefox

It is installed the latest version of Firefox 3.6.3 on 2 machines. Both machines runs under Windows 7, but one is 32 bit version, another is 64 bit. The 64 bit machine does not display scrollbars on my website. 32 bit machine and machines under Windows XP does not have that problem. I have googled but have not find such issue. Could you please let me know how at least I should investigate that?

Scrollbars emulated by 2 divs. One nested into another. Nested div is higher then external, so external div displays a scrollbar开发者_StackOverflow.

You have to look furter to find differences between the machines. It's most likely not a problem of having a 32 vs. a 64 bit version of Windows.

I have 64 bit Windows 7 and I tried your site in Firefox 3.6.3, and the scrollbars appear just fine.

Firefox is a 32 bit application, so it will run in 32 bit mode (WOW) on a 64 bit system.