title: Incomplete cache storage
body: <p>I'm trying to cache thumbs (jpg) by <code>cache.addAll()</code> listed in an array fetched from server. So far so good.</p>
  
  <p>The array has 365 thumbnail images listed, ~20MB total. Dumping the array in the console shows all thumbs listed.</p>
  
  <p>Both Firefox and Chrome cache/app storage list only ~70-80 of the thumbs added to cache.</p>
  
  <p>I tried setting <code>cache.maxEntries = 400</code> but this makes no difference.</p>
  
  <p>Does this reflect a cache storage limit on # of items and/or storage size, or could there be other factor(s) causing this?</p>