Steps to reproduce:
Open "contacts" area, create or edit a contact
Labeling in "Properties" and "Personal" is not intuitively understandable: where can which data/kind of information be found respectively added?
I personally would never term information such as an email address would as "Properties" - conversely, gender (currently listed under "Personal") for me would rather be a "property"!
- Better labelling (e.g. "contact data" for general information such as adress, email address, organization etc., and "Personal details" for gender, birthday, anniversary etc.)
- Consider whether the separation in different tabs with those labels is senseful at all! It might be easier for the user to just have one site with all the information needed below each other, possibly separated in the different areas, which are currently different tabs simply by differente titles.