Feb 12
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On Wednesday, Feb 1, 2012, we published an article discussing some changes StumbleUpon made during their recent redesign which removed source links from their content pages and forced all users to view content from the site through an iframed toolbar, which they could not close if they were logged… Please visit Search Engine Land for the full article.
Continue reading here:
StumbleUpon Responds To Concerns About Links & Iframing