One of our users has a presentation with a playlist that contains links to several web pages.  The web pages are very basic--no flash.  Randomly, it seems, the screen will go black when a new page is loading.  Eventually the page will load very slowl...

One of our users allows people to submit jpg files for display.  About every 10th file appears ok in preview but is black on sign, and looks like broken link.  All the files are smaller than 1Mb, and are 8 bit or 16 bit.  Any suggestions?