I found a fine article describing a small agent which is checking if a document contains broken doclinks. I had no time to test the agent yet but for what I understood it is quite simple to implement.
Another Bug that has everything it needs to come onto my personal favorites list. Read on and decide by your own:
In Lotus Notes 6 you can "Drag and Drop" a document from any view or folder onto your Windows Desktop or any folder on your harddisk. Notes automatically creates a Document Shortcut which is in fact a file with the extionsion .shb which are marked by registry entries as special objects like files with extionsion .lnk.
Try to create such a Document Shortcut and cut it from your Desktop to paste it into any folder - this will crash your Windows Explorer.
If you experience the same problem please report it to IBM Lotus Support, they are looking for reproduceable scenarios to get this fixed in a later release.
Everybody who upgraded his Domino Server to 6.x will have seen that LDAP is started by default on the Administration Server of the Domino Directory. Removing LDAP from the parameter ServerTasks in the notes.ini does not disable this task as the Domino Server adds this task automatically after the next restart.
The trick is to add the parameter DisableLDAPOnAdmin=1 to the notes.ini, remove LDAP from ServerTasks and quit the running LDAP task. This should prevent the Domino server to add LDAP again. See Lotus Technote 1099161 for Details.