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Feb 15, 2009
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Boston, MA
Wirelessly posted (Mozilla/5.0 (iPod; U; CPU iPhone OS 4_1 like Mac OS X; en-us) AppleWebKit/532.9 (KHTML, like Gecko) Version/4.0.5 Mobile/8B117 Safari/6531.22.7)

Many apps that are compatible with iOS 4 are compatible with iOS 4.1. If the app hasn't been updated, wait for it to be or contact the developer.
 
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