Boonex Dolphin Primary Photo Bug

I have an installation of Boonex Dolphin in which some users keep losing their primary photo. The photo remains among their profile pictures, it just doesn't retain a designation as primary photo. More details: -- Not all users have this problem -- None of the users for whom this is a problem can point to anything they did that might have triggered this problem -- Primary photos are kept for a variable number of days (a few days to a week) before they are lost Please respond if you: -- Are very familiar with Boonex Dolphin Preferrably: --Familiar with this specific problem I'm looking for a solution and a detailed description of what code has been changed and why. Half funds payed on solution and the other half paid a week later after I verify that the problem has ceased. Thanks for your response!