I will test this soon (I'm currently booted in to Breezy). I have seen the problem recently, but I have not tested it with the latest Epiphany version in Dapper.
When the problem occurs though, the CPU usage goes to ~100% for the duration of the download even with nothing else running in the background, and CPU usage drops back down to normal (0-3%) after the download completes.
I will test this soon (I'm currently booted in to Breezy). I have seen the problem recently, but I have not tested it with the latest Epiphany version in Dapper.
When the problem occurs though, the CPU usage goes to ~100% for the duration of the download even with nothing else running in the background, and CPU usage drops back down to normal (0-3%) after the download completes.