TOra version 2.1.3 Windows
Connections do not always get closed properly. If you use the File - Close Connection option this seems to close connections properly. However, if a user forgets to do this manual step and clicks the Close button in the corner, happens to crash TOra, etc. (basically anything that does not use the File - Close Connection menu option) TOra leaves behind connections to the database and a DBA has to clean these up.