weird errors or else?

Hi all:

I am compiling xscreensaver-kde and it stooped with following errors:

----------------------------------------------------------------
Package tocloft Note: The document has chapter divisions.

) (/usr/local/share/texmf-dist/tex/latex/hyperref/hyperref.sty
(/usr/local/share/texmf-dist/tex/latex/hyperref/pd1enc.def)
(/usr/local/share/texmf-dist/tex/latex/hyperref/hyperref.cfg)
Implicit mode ON; LaTeX internals redefined
(/usr/local/share/texmf-dist/tex/latex/hyperref/backref.sty)
(/usr/local/share/texmf-dist/tex/latex/url/url.sty))
*hyperref using default driver hpdftex*
(/usr/local/share/texmf-dist/tex/latex/hyperref/hpdftex.def
(/usr/local/share/texmf-dist/tex/latex/psnfss/pifont.sty
(/usr/local/share/texmf-dist/tex/latex/psnfss/upzd.fd)
(/usr/local/share/texmf-dist/tex/latex/psnfss/upsy.fd)))
Writing index file doxygen_manual.idx
(./doxygen_manual.aux
! Text line contains an invalid character.
l.2 ^^_at_
       ^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_...

? ^C
! Text line contains an invalid character.
l.2 ^^_at_^^_at_
          ^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_^^_at_...

? X
No pages of output.
Transcript written on doxygen_manual.log.
gmake[1]: *** [doxygen_manual.pdf] Error 1
gmake: *** [pdf] Interrupt: 2
--------------------------------------------------------

seem to me it want to write something but it doesn't tell me what to do next...

what should I do next?

Thanks