On Monday, Twitter delayed a scheduled upgrade so that its micro-blogging service would not be down during daylight hours in Iran, where Tweets have fueled protests against the disputed presidential election. And according to press reports, the delay was requested by the US State Department. "In coordination with Twitter, our network host had planned this upgrade for tonight," Twitter co-founder Biz Stone wrote in a blog post Monday afternoon. "However, our network partners at NTT America recognize the role Twitter is currently playing as an important communication tool in Iran. Tonight's planned maintenance has been rescheduled to tomorrow between 2-3p PST (1:30a in Iran)."

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