Apple quietly slipped its Developer Center offline on Sunday night for maintenance and, it turns out, to patch a serious security hole that let anybody access personal contact information for any registered Mac, iOS or Safari developer; every Apple Retail and corporate employee; and some key partners. The news comes from 9to5Mac. The publication and the developer who discovered it, Jesse Jrvi, kept mum about the hole until Apple fixed it. The fix comes fast on the heels of critical security fixes for OS X, iOS and Apple TV that Apple put out last week.”]