I have a gigabeat f40s. I downloaded the given example Elephant's Dream video and it plays and resumes fine, but when I went to encode my own movies I found that they would play, but not resume. I would select resume and the screen would turn black, and for a while I could hear/feel the hard drive clicking. When I ran the same test in the simulation environment on my PC, the CPU usage was 100% and it never recovers no matter how long I wait. Again, Elephant's Dream doesn't have this problem so it probably has something to do with my encoding method. I'm using Tsunami MPEG to encode.
I've got a short sample video that I'd be happy to send to anyone but I'm reluctant to simply post on a forum.
Thanks for you're help.