I'm having the exact same problem as you guys. MK1, Latest version of Emplode and the developer's image. Running Win98SE on a pretty fast machine, Pentium III (500-600 MHz? can't remember) >= 128M ram? High speed RAID controller. USB is direct to motherboard (not through a hub).

I am syncronizing while plugged into the car sled (don't ask - hardware hacking). I guess first I'll try taking it out of the sled, if that doesn't fix it I'll try connecting to my laptop (much slower) to see if that fixes it. If I get any successful results, I'll let people know.