David,
From: http://www.softrak.com/ubbthreads/ubbthreads.php/topics/37544/Edit_Accounts_function#Post37544

When you're on the Edit Accounts window, can you access the Column Editor (double click on the column headings row in the grid)and change the 'Active records only' setting? If it is currently enabled, disable it and vice versa. After, close out of the Edit Accounts window and then reopen it.