Hi Jack,
I am working on new 2.3.1 store and have the header tags implemented.
I have run into several issues getting them to work.
ie: the text at the bottom of a product page will only show the product name if the default title tag is left blank in page control.
I cannot get any titles to show up on product listing pages. Words go into the Db, but not on the web page.
So after some reading, I found out the Seo urls 5 is a problem when installed with header tags. Then I read the the other add on should be set to rewrite method so it will play nice with yours. Ugh, my test setup is in a subdirectory of my live store so i can use the ssl. if I use rewrite, all my links go to my live store.
Can you confirm that my issues, at least the 2 I mentioned, are a result of the 2 add ons incompatability? If so, I could turn rewrite on once the site is ready to go live.
Tim