Fixed in 1.87. Fixed in 1.85. Each time you edit, delete extraneous tags Fixed in 1.85. URLs entered in text fields get munged. Fixed in 1.71.
Index gets out of sync with deleted pages.
We need to trap for use of delete form in discuss view. Use Admin page to delete messages. Fixed in 1.72. Fixed in 1.5.4. Something has stomped on your user.rootUpdates.servers.metaData table.