This week in the MacNN forums, members discuss bugs in Mavericks, slow MacBooks and more. After Grizzled Veteran “And.reg” upgraded to Mavericks late last week, a discovery was made that there was a bug in Spotlight that causes it to crash. Dedicated MacNNer “kenna” turned to the forums this week in hopes of finding a solution to a slow MacBook Pro problem that they fear may be the result of a dying hard drive….