@uncleV
Below is a screenshot of the repository settings I made. Please check if it's correct:

One more thing... after I click "Reload", it will proceed to the "Downloading 1 of 11" (sometimes it's "Downloading 1 of
10"(?)) but will still produce the same error message I posted earlier. Forgot to mention there's a box that says:
http://distro.ibiblio.org/pclinuxos/pclinuxos/apt/pclinuxos/2010/base/pkglist.main: Could not resolve 'distro.ibiblio.org'
http://distro.ibiblio.org/pclinuxos/pclinuxos/apt/pclinuxos/2010/base/release.main: Could not resolve 'distro.ibiblio.org'
http://distro.ibiblio.org/pclinuxos/pclinuxos/apt/pclinuxos/2010/base/pkglist.updates: Could not resolve 'distro.ibiblio.org'
http://distro.ibiblio.org/pclinuxos/pclinuxos/apt/pclinuxos/2010/base/release.updates: Could not resolve 'distro.ibiblio.org'
http://distro.ibiblio.org/pclinuxos/pclinuxos/apt/pclinuxos/2010/base/pkglist.nonfree: Could not resolve 'distro.ibiblio.org'^^ sometimes there are 5 lines, sometimes there's just 1 or 2.

... and then it's followed by another error message box, saying:

Is the problem from my end, or the server's end? Are you also saying I shouldn't proceed with "Mark All Upgrades > Apply > Apply" if I keep on getting error messages?