Hi,
When I use the diving locations GPS dropdown box I cannot enter seconds with a dot ad decimal separator (it will just remove the . and the position is very wrong).
When I enter the seconds with a comma, it accepts but when i collaps the DPG dropdown box it shows it with a dot again in the Lattitude/Longitude.
It's best to just replace all non numerical characters with the decimal separator before trying to attempt a conversion to a number (it's the solution i use in most of my software). Although not perfect it catches a lot of locale problems.
Another bug in the dialog is that if you press save with the GPS dropdown box visible, all editing is lost in these fields.