We have updated the Twitterfountain with a new default setting. The flow of messages now automatically goes vertical (or up, in just one syllable). It is a default that you can deselect in the settings.
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It would appear that the new Flash Player 10 might not play the Twitterfountain correctly. At least om Mac OS X 10.5, on an Intel-machine. We are looking into this and will fix it as quickly as possible.