Barnes & Noble suffered a serious, widespread, unspecified IT systems problem that appears to have begun on Saturday and was mostly remediated by Tuesday afternoon. The most obvious signs of the problem to the outside world were significant issues accessing Nook titles and other data (libraries, wishlists, etc.) and problems logging into BN.com accounts and reported delays in shipping those orders, while in-store customers appear to have faced at least some checkout issues and difficulty with special orders, stock-finding and other functions that required computer assistance. A BN spokesperson told PL Tuesday afternoon, “We have a serious network issue and […]