Smartphone sales were explosive in 2012 and the tablet market finally came into its own after being a one-horse town since 2010. Market leaders like Apple (AAPL) and Samsung (005930) are expected to post massive results in the fourth quarter and shipments from smaller vendors have continued to grow as well, but questions surrounding how long these runs can last continue to be raised. To compound the issue, vendors may have been too aggressive with recent orders; in a new report from Digitimes on Wednesday, the site’s unnamed industry sources suggest overzealous smartphone and tablet vendors may have caused a pile-up as 2012 draws to an end, leaving the first-quarter in question for a number of suppliers. Smartphones and tablets

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Smartphone, tablet pile-up may lead to grim Q1 for suppliers