I just updated a Magento CE site from 188.8.131.52 to 184.108.40.206. This is a multi-store site. Two stores, two domain names, one Magento installation, one server. And these stores, this Magento installation, has been working fine for a long time.
After what seemed a smooth and successful update to 220.127.116.11 I noticed that seemingly at random one of the two sites will display the logo and a footer banner from the 'other' store.
There are two separate themes set up - one for each store. The multi-store is implemented using a separate directory for the second store with it's own index.php file (also updated manually as part of the 18.104.22.168 update) and all other directories are symbolic links back to the main Magento installation.
At time A, store 1 displays the theme for store 1 and the logo and footer banner for store 1. AND store 2 displays the theme for store 2 the logo and footer banner for store 1. If time passes or I refresh the cache or some other random event occurs then...
At time B, store 1 displays the theme for store 1 the logo and footer banner for store 2 AND store 2 displays the theme for store 2 the logo and footer banner for store 2.
Each store always shows the correct theme (store 1 and store 2 themes are distinctly different). But they randomly (seemingly) show a logo image and footer banner that is incorrect.
It is worth noting that both the logo image and footer banner are defined in CMS static blocks. So each store has a static block for the header logo and one for the footer banner.
I would appreciate any brainstorming ideas on how to quickly identify and resolve this issue.