Very Slow Connection to 2.4GHz Wireless B After 2.0 Update

Ever since I updated to 2.0 my Wi-Fi at home has been extremely slow. Sometimes I get error messages telling me the server stopped responding or other strange error messages. (If I'm close to my PC I'll record future errors)
This is very strange since I have two laptops that still run on my old Wi-Fi just fine. Don't tell me that the 2.0 update doesn't support anything below Wireless G. Anyone else experiencing this issue?
At work we have Wireless G access points and the connection is fast. I know it's probably time to upgrade to a faster Wireless router at home but my old Linksys has been working great for years. A new Linksys wireless G is only around $50.00 but I didn't plan on upgrading since... well 2.0 was free!!!

Here's the error message:
Safari can't open the page.
The error was: "Operation could not be completed.(kCFErrorDomainCFNetwork error 302.)"

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