+'bbcode' - called during conversion of bbcode to html
+ $b is (string) converted text
+
+'html2bbcode' - called during conversion of html to bbcode (e.g. remote message posting)
+ $b is (string) converted text
+
+
+'page_header' - called after building the page navigation section
+ $b is (string) HTML of nav region
+
+
+'personal_xrd' - called prior to output of personal XRD file.
+ $b is an array
+ 'user' => the user record for the person
+ 'xml' => the complete XML to be output
+
+
+'home_content' - called prior to output home page content, shown to unlogged users
+ $b is (string) HTML of section region
+
+'contact_edit' - called when editing contact details on an individual from the Contacts page
+ $b is (array)
+ 'contact' => contact record (array) of target contact
+ 'output' => the (string) generated HTML of the contact edit page
+
+'contact_edit_post' - called when posting the contact edit page
+ $b is the $_POST array
+
+'init_1' - called just after DB has been opened and before session start
+ $b is not used or passed
+
+'page_end' - called after HTML content functions have completed
+ $b is (string) HTML of content div
+
+
+