MS get sued over tabbed browsing ?

Over on Slasdot is an article claiming that Mozilla is suiing MS over its implementation of tabbed browsing on IE7, claiming that they have a patent. They're going for $1.4b, and MS recalling ALL IE7. Wow.

It would be ironic to say the least if MS were in breach of someone elses patent, given the lengths they go to to defend theirs.. This one will be interesting to watch.

I pity the poor MS share price - stagnant since 2001 - what will this do to it ?