A Chiriquí Chatter reader sent me the following link. If you are using the standard Tourist Visa to stay in Panama this is important to you. If you don´t read Spanish you may want to use the Google translation tools to read this.
Panama has changed Article 36 of Law 15 and the duration and limits of the Tourist Visa have changed. It basically says that the new tourist visa is valid for only 30 days and may be extended once for a total of 60 days.