I may be missing something, but I had an imported iCal trip last weekend that I can no longer find. My journal says, regarding this trip, "We imported a trip (since deleted) from an external calendar."
This seems like a problem, especially given your super awesome carbon calculator working on the basis of old trips. (I noticed this while trying out the calculator.)
Suggested behavior for trips imported from iCals: Once the trip starts, disconnect it from the iCal so that when it goes into the past and disappears from the iCal, it doesn't disappear from Dopplr.
I have a calendar import set up from Tripit, which works great, except . . .
Occasionally the trips that have been imported from my iCal get deleted and re-added. This only appears to happen when the link has not been broken by editing the trip in Dopplr. This started happening last Saturday and happened again this Saturday.
I didn't make any changes to my Tripit feed, though I suppose they could have reset something on there side.
This isn't exactly a problem for me, but I assume it also causes my trips to show up again in all of my contact's activity feeds. Not good :-(