After upgrading titles are now all broken.
Instead of what I have in "SEO Title" field, it now has the <WP Site Title>+' '+<WP Tagline>+"SEO Title"
AND without a space in between so it doesn't read at all
So say your SEO Title says "Best foobar site", and your WP Site Title says "John Smith & Co", WP Tagline says "Best fish in Canada"
In the past your page title would be "Best foobar site". Now it is "John Smith & Co Best fish in CanadaBest foobar site"
If you delete all the WP tags (which will probably break something else) you get " Best foobar site" <note the leading space>