Build error in khtml

[Allan Sandfeld Jensen]

I have been unable to build khtml for some time now. I get the following 
errors:

.libs/khtml_part.o: In function `KHTMLPart::slotViewPageInfo()': 
/usr/cvs/kde/kdelibs/build-3.1/khtml/../../khtml/khtml_part.cpp:2282: 
undefined reference to `KHTMLInfoDlg::KHTMLInfoDlg[in-charge](QWidget*, char 
const*, bool, unsigned)'
.libs/htmlpageinfo.o:/usr/cvs/kde/kdelibs/build-3.1/khtml/htmlpageinfo.moc:51: 
undefined reference to `KHTMLInfoDlg::~KHTMLInfoDlg [in-charge]()'
.libs/htmlpageinfo.o:/usr/cvs/kde/kdelibs/build-3.1/khtml/htmlpageinfo.moc:51: 
undefined reference to `KHTMLInfoDlg::~KHTMLInfoDlg [in-charge deleting]()'
.libs/htmlpageinfo.o:/usr/cvs/kde/kdelibs/build-3.1/khtml/htmlpageinfo.moc:81: 
undefined reference to `non-virtual thunk [nv:-40] to 
KHTMLInfoDlg::~KHTMLInfoDlg [in-charge]()'
.libs/htmlpageinfo.o:/usr/cvs/kde/kdelibs/build-3.1/khtml/htmlpageinfo.moc:82: 
undefined reference to `non-virtual thunk [nv:-40] to 
KHTMLInfoDlg::~KHTMLInfoDlg [in-charge deleting]()'
collect2: ld returned 1 exit status

should I worry?

PS. I use g++ 3.1.1