WZZZ and baltwo,
Thanks for your feedback.
Maybe the OS X 10.6.8 combo update v1.1 is not supposed to overwrite an installed version of Safari, but it did on my mid-2007 MacBook 2,1.
I upgraded to OS X 10.6.3 from a retail upgrade disk sometime shortly after the 10.6.3 retail package was released.
I installed the OS X 10.6.8 combo update in early 2012, and subsequently installed the later Safari updates related to Flashback. On August 20th, 2012, I was running Safari 5.1.7.
Then I changed internet providers and did not connect again until the morning of August 23rd.
Trying to cure an issue related to some networked printers, I downloaded and re-installed the OS X 10.6.8 update combo v1.1 on August 23rd, 2012.
The combo update DID overwrite Safari 5.1.7 with 5.0.5.
The reason I realized something was different was because I noticed that the + sign to add a bookmark often disappeared from my toolbar, even after I reinstalled the default toolbar.
When I checked Safari, About Safari, 5.0.5 was installed, not 5.1.7.
Running Software Update did not offer to install any Safari updates.
I attempted to find Mac OS X 10.6.8 Safari 5.1.7 on the Apple site, so I could re-download and reinstall, but was only successful in finding a link to Safari for Windows 5.1.7 after multiple searches on two different occasions.
Sorry to cause so much trouble.
Please tell me who I contact to remove this account and all my misinformation, because I certainly don't want to leave any trace of bad information behind.