got "invalid image dimensions" error

When I tried to compile tor package for karmic, it returns error and failed, but it works well on jaunty, here is the error output:
[4]
! pdfTeX error (ext1): invalid image dimensions.
<argument> ... page \GPT@page \fi {\Gin@base .pdf}
                                                  \setbox \@tempboxa =\hbox ...
l.631 \mbox{\epsfig{figure=cell-struct,width=7cm}}

! ==> Fatal error occurred, no output PDF file produced!
Transcript written on tor-design.log.