docbook for ksysguard does not compile

[Erik Kjær Pedersen]

[erik at denal ksysguard]$ meinproc --check index.docbook
index.docbook:22: element othercredit: validity error : Element othercredit 
content does not follow the DTD, expecting ((personname | (honorific | 
firstname | surname | lineage | othername | affiliation | authorblurb | 
contrib)+) , (personblurb | email | address)*), got (CDATA email )
</othercredit>
              ^
index.docbook:466: parser error : Entity 'John.Tapsell' not defined
<para>&ksysguard; is currently developed and maintained by &John.Tapsell;
                                                                         ^
index.docbook:467: parser error : Entity 'John.Tapsell.mail' not defined
&John.Tapsell.mail;. &ksysguard; is a rewrite of
                   ^