For a long time I've suspected there has been a critical data deletion bug in Recorder 6 - it occurred the other day so I made some time to see if I could reproduce it. The circumstances are obscure and unlikely to occur on a regular basis but I can confirm Recorder 6 will delete data without warning.

It requires two users to be viewing the same record in the observation hierarchy at the same time. If user one deletes a record, and the user two tries to select the record, user two is presented with a dialog "Unable to access the record. It has been deleted from the database". Recorder 6 on users twos computer then proceeds to move up the hierarchy deleting it.

I've attached an example showing a sequence of screenshots from user twos perspective, with the 7-spot ladybird being the obs that is deleted by user one. This example resulted in an error message, and deleted the 2-spot ladybird and containing sample.