Marcus,
(I have the bold)
When I hit the FF button a few times too many when a video podcasts reaches the end of playback, it causes a hard crash, causing the BB to do a complete reboot. I've been able to consistently replicate this issues, but only with video podcasts. I have not tested with audio. (Sometimes I noticed that this happens when I press FF quickly in the middle of playback, but I think this was fixed with some of the more recent releases)
Thanks,
Ed