freejung - 4:22 pm on Feb 18, 2011 (gmt 0)
Sometimes Google tries really strange stuff with this. For example, the other day I noticed a title that Google had changed by adding the title of my homepage to the title of a subpage. Apparently the subpage title wasn't long enough in G's opinion.
What was really weird about it is that it wasn't the current title of the homepage, it was the title that the homepage used to have months ago.
To me that suggests that Google is storing a database field somewhere for "name of site" or something similar, and it periodically refreshes that field with the title of the homepage, but not nearly as frequently as it crawls and indexes the actual page.
So pick your homepage titles carefully. As if you weren't doing that already...