After looking at the reference in the asnwer (the ms-help: ref doesn't work for me) I tried the 'DBCC DBINFO()' statement and just got a message 'DBCC execution completed. If DBCC printed error messages, contact your system administrator.'!

More searching revealed that the command 'dbcc traceon(3604)' was needed as well! Perhaps this should have been mentioned somewhere!

Also a document search for either 'bootpage' or 'boot page' came up with nothing in the 2005 BOL and nothing that I could see that was relevant in MSDN (though I didn't check every MSDN link, just skimmed the intros).