Ahh, problems questioned in diary posts almost gets a faster response than from mailing lists or forums :p. I hadn't bothered doing a forced update yet, but I'd done them 2 weeks ago and thought mapnik would have rendered them. I didn't know that rivers should be drawn in their direction of flow, thanks for that one.

Just to clarify, are you downloading ACTIVE_LOG or saved tracks? Saved tracks have the timestamps stripped, only the active log has them (well, this is the case on my eTrex Legend HCx anyway). So you'd need to download the active track before saving or clearing it.

For future reference I'd recommend getting a GPS that takes an SD card, a 1G SD card can hold ~100 days worth of data at 1 sample/sec and it continues to recored a tracklog even after the active track is full. Oh, and timestamps are included. It's a shame that error estimates aren't though.

If you want to save the tracks on the GPS (ie, to keep the active track clean or to store more data) then robx's suggestion of just using JOSM (main website: http://josm.openstreetmap.de/) is probably the easiest solution.