Following some advice about WordPress security, I added "Options -Index" to my .htaccess file. Now when I try to open the Dashboard I get the message "You cannot access this file directly."
I have removed the .htaccess file, cleared the cache in Firefox, even reuploaded the entire contents of the /wp-admin folder. All the other tabs within WordPress still work--just not the Dashboard.
Now, one other blog that I use as a test platform and have not yet upgraded to 2.3.2 is still working perfectly.
What would you suggest?