After importing some bookimark lists into VGPS, one of the entries come up as null, with coordinates S00 00.000 W000 00.000, and most other fields blank. I suspect this is because one of the bookmark lists contains an event that was later retracted (not archived). It seems that it's impossible to delete this from the VGPS. Clicking the tick box and deleting has no effect as the null entry remains. Is there any way of getting rid of this?