Since the hostilities ended in 1995, there remain an estimated 90,000 land mines in Croatia. However these are not to be found in areas visited by tourists. If you plan to hike consult locals before you go.
Avoid strip clubs at all costs as they are often run by shady characters who overcharge their guests and if you are unable to pay you can find yourself in a local hospital.
Be careful at night in the warren of streets in the Palace, as you are especially vulnerable here.