A page or piece of shared content sometimes is published under a name that no longer exists on the author system. This can happen if a user without publishing rights renames a published page, or possibly for other reasons.
When a Faces and Voices Hero component is loaded onto a page with a lot of other content (especially in multiple columns), it may confusingly display over top of existing components, making it difficult to see and edit the the underlying components.
When in Edit mode, clicking to open a link in a new browser tab or window loads the new page without the Flex UI header, removeing 'editor.html/' from the page URL in the location bar. Opening in the same tab works normally.
We have seen cases where a Photo Gallery does not load quickly or seems to never load. In this situation, the problem seems to be unreliability and poor response due to the file size of the images being displayed from the DAM. Extremely large images can be a problem, as well as lots of relatively large images.
Secure pages are by design only accessible to a user once they have successfully logged in through Shibboleth. In some cases, like the List Component, the UBCMS is smart enough to not even reveal a link to a secure page unless the user should see the link, but this makes it difficult to naturally reveal these pages in lists.
Your site includes content such as a news or events feed from another UBCMS or external source, and what is shown on your site doesn't update when that external feed changes. This has to do with server caching.
When a tag is moved or merged, any pages already carrying that tag retain a 'ghost' of the original tag in their meta-data. This can corrupt tagged lists that are built on a parent of the original tag.