A new version of Database Navigator plugin for IDEA 8.1 was released. (2.0.1285)
One of the main features is the regional sensitive display format and input validation of dates and numbers. The default setting is taken from the system default locale. You can select the desired locale and formatting in the "General" settings tab. The custom formats are now used allover the application, on query results, data browsing, data editing, method execution and so on.
Additionally, the data editing has been improved substantially.
Objects factory is now supporting the creation of functions and stored procedures.
The plugin update may not be visible in your plugin manager due to some issues with the versioning patern.
You may need to locate and download it from the "Available" tab of your plugin manager instead of the tab "Installed".