Agreed, Andrew. The headline specifically states that Yahoo will accept Microsoft's acquisition. Accepting "some sort of serious investment from Microsoft" is not the same as accepting an acquisition bid. Yahoo has quite specifically rejected Microsoft's acquisition bid.

A number of articles have even been posted here to The Standard stating that:
http://www.thestandard.com/news/2008/02/11/yahoo-says-microsoft-offer-un...
http://www.thestandard.com/news/2008/02/11/whats-behind-yahoos-rejection...
http://www.thestandard.com/news/2008/02/11/update-yahoo-says-microsoft-o...
http://www.thestandard.com/news/2008/02/09/wsj-yahoo-reject-microsoft-of...

The original intention of this Prediction was not whether Yahoo would accept some sort of investment from Microsoft. It was that Yahoo would accept Microsoft's acquisition bid. The judgement should follow the spirit of the prediction (and the letter of the prediction's title), not try to get out on a technicality that "investment" was mentioned in the body.