title: Using QuickLook to preview PDFs causes allocations to rise indefinitely
body: <p>I'm using Apple's sample code (verbatim) for <a href="http://developer.apple.com/library/ios/#samplecode/DocInteraction/Introduction/Intro.html" rel="nofollow">Document Interaction</a> using the QuickLook framework/QLPreviewController to display PDFs to users (PDFs are roughly 4-5 MB).</p>
  
  <p>When running this code through Instruments, Memory Allocation grows. However, it never seems to dealloc. Is this a known issue or is Apple's sample code missing something?</p>