I was downloading OS X Lion (again) from the App Store overnight. I woke up this morning, paused the download at just over 2GB and quit the App Store in order to restart my computer. When I tried to resume the download, it started again from the beginning! What happened to my 2GB that I already had? I had no warning that quitting the App Store would result in any progress being lost. This is so frustrating coming from New Zealand, where internet bandwidth is almost worth more than gold. It's expensive and slow and extremely annoying when events like this happen.