Released 6.99.3 with the following fixes:
1) Content server: Show newly added books on the home page
2) Content server: Fix modal popups no longer centered
3) Content server: Add button to return to book page at the top level of the viewer controls
4) Further performance improvements for the Manage X dialogs
5) Add a show items in selected books option to the Manage X dialogs
6) Show note dialog: Fix links not being activated when clicked
7) Content server: Book details: Open links in comments fields in the same window rather than a new window
8) Show the pencil icon instead of the checkmark for notes in the manage X dialogs
https://download.calibre-ebook.com/betas/