sitesafe says site is safe, then pops up and blocks the site

Hi,

When I google techsoup, it is listed as a norton safesite. I click on the link, and norton safesite says the site is blocked. If I continue to the site anyway, then click on the red x in the menu bar for site details, the site page report says the site is safe. Is it safe or is it not? I'm using Firefox 13 on Windows Vista Home Professional, NIS 19.7.1.5 Here's screenshot1:

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And then here's screenshot 2 saying the site is safe:

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