We randomly get the following two issue with our Drupal site:
1. The header styling breaks and displays an overlapping image at the top of the page
2. The message "The website encountered an unexpected error. Please try again later." shows up on most pages.
When the error appears, it seems to place a layer over the page making any page content such as links and forms inaccessible with the mouse.
Sometimes clearing the cache helps, other times it does not.
Please see the attached DOC file for details or visit our site: [login to view URL]
We need someone to identify the root cause of this error.