I suspect that a recent update has severely impeded my ability to access a website:

z8.invisionfree.com/Vital_Enterprises

Someone posted a similar fix for the website www.pcfinancial.ca I will try to find that thread and link to it.

If anyone could confirm whether or not they can access the z8 website, then I can know whether or not Linux is the problem.

Thanks in advance.

Yes, it is accessible, try emptying your cache and cookies.

Works for me, too.

Maybe you could try to disable IPv6 if the solution in the above post doesn't work..

Just for informational sake, as of 9.04 IPv6 is part of the kernel and cannot be disabled.