There appears to be a bug in that the Install date listed for programs under Tool\Unistall is wrong (one day prior to actual installation - in my case, programs actually installed 21 April but CC reports Install Date as 20 April).
I noticed this today right after I installed 318.1707. A few of my installed programs now show an "Installed Date" of today (including McAfee which does update pattern files daily and CCleaner), and while many others appear 'normal', there are quite a few which show recent dates even though they've been there for quite some time and have not been updated etc. As far as the 'today' programs, HP Precision Scan (not updated for - literally years and not even used for over a month), FireFox, VLC, Windows Media Player 11 (which I haven't used since I installed VLC over a year ago), Compaq's Easy Access Button Support on this old Compaq which hasn't been touched since the OS was installed 4 years ago, etc.