I have checked my Security preferences and they are already enabled (Safari v. 5.1.9). Having checked my applications folder, I do have a file named "Java Preferences" listed there. I have also disabled Java in Firefox.
I have tried to download yet again and Java told me that the download was successful. However, when I tried to use it, I was told that it had not downloaded. I went into my console log which showed the following (I hope this is helpful) ........
2013-08-10 17:35:34 +0100 ---------- log start ----------
2013-08-10 17:35:34 +0100 All install checks pass
2013-08-10 17:35:44 +0100 User has 1 process that needs to be closed before the Flash Player can be installed.
2013-08-10 17:35:47 +0100 [install started]
2013-08-10 17:35:56.103 installer[23841:2e07] PackageKit: *** Missing bundle identifier: /Library/Receipts/ScanGear MP450 202.pkg
2013-08-10 17:35:56.636 installer[23841:2e07] PackageKit: *** Missing bundle identifier: /Library/Receipts/SpeedTouchUSB.pkg
installer: Package name is PlugIn
installer: Installing at base path /
installer: The install was successful.
sudo: no tty present and no askpass program specified
2013-08-10 17:36:12 +0100 [install completed]
2013-08-10 17:36:12 +0100 [install succeeded]
2013-08-10 17:36:20 +0100 ---------- log end ----------
2013-08-10 17:36:20 +0100 Changing update mode to 0
I tried to use my bt broadband checker but this stated that I needed to download Flash Player!!!! Unfortunately it seems that I have no alternative but to try and download it ..... otherwise I would not bother.
Hope this gives you a full picture.