Toad does not allow the user to type in the editor pane of the SQL Editor Window after executing a statement with the F5 (Execute as Script) command. The focus is no longer in the editor pane after the statement is executed.
Steps to Replicate:
1) Write a simple SQL statement in the SQL Editor
2) Highlight the statement
3) Hit F5 to run the statement
4) After the statement is executed, try to type anything.
Manually click in the SQL Editor pane with the mouse or press F6.
This issue was fixed in Toad for Oracle 8.6. The latest version of Toad for Oracle can be downloaded at: http://support.quest.com/support_download/Downloads.asp.