System error

error:  Can't locate object method "header_in" via package "Apache2::RequestRec" at /data/site/domains/guft/sites/www/site/guft.css line 80.
context: 
... 
76:  $r->content_type('text/css');
77: 
78:  # For some reason IE seems to make fonts look bigger.
79:  my $font_size = "11pt";
80:  $font_size = "10pt" if $r->header_in("User-Agent") =~ m/MSIE/;
81:  </%init>
82:  <%flags>
83:  inherit => undef
84:  </%flags>
... 
code stack:  /data/site/domains/guft/sites/www/site/guft.css:80
raw error






























Can't locate object method "header_in" via package "Apache2::RequestRec" at /data/site/domains/guft/sites/www/site/guft.css line 80.


Trace begun at /usr/lib/perl5/vendor_perl/5.8.8/HTML/Mason/Exceptions.pm line 129
HTML::Mason::Exceptions::rethrow_exception('Can\'t locate object method "header_in" via package "Apache2::RequestRec" at /data/site/domains/guft/sites/www/site/guft.css line 80.^J') called at /data/site/domains/guft/sites/www/site/guft.css line 80
HTML::Mason::Commands::__ANON__ at /usr/lib/perl5/vendor_perl/5.8.8/HTML/Mason/Component.pm line 135
HTML::Mason::Component::run('HTML::Mason::Component::FileBased=HASH(0x9832870)') called at /usr/lib/perl5/vendor_perl/5.8.8/HTML/Mason/Request.pm line 1292
eval {...} at /usr/lib/perl5/vendor_perl/5.8.8/HTML/Mason/Request.pm line 1287
HTML::Mason::Request::comp(undef, undef, undef) called at /usr/lib/perl5/vendor_perl/5.8.8/HTML/Mason/Request.pm line 486
eval {...} at /usr/lib/perl5/vendor_perl/5.8.8/HTML/Mason/Request.pm line 486
eval {...} at /usr/lib/perl5/vendor_perl/5.8.8/HTML/Mason/Request.pm line 436
HTML::Mason::Request::exec('HTML::Mason::Request::ApacheHandler=HASH(0x96fdc98)') called at /usr/lib/perl5/vendor_perl/5.8.8/HTML/Mason/ApacheHandler.pm line 168
HTML::Mason::Request::ApacheHandler::exec('HTML::Mason::Request::ApacheHandler=HASH(0x96fdc98)') called at /usr/lib/perl5/vendor_perl/5.8.8/HTML/Mason/ApacheHandler.pm line 825
HTML::Mason::ApacheHandler::handle_request('HTML::Mason::ApacheHandler=HASH(0x95bd384)', 'Apache2::RequestRec=SCALAR(0x95c5d7c)') called at (eval 1088) line 8
HTML::Mason::ApacheHandler::handler('HTML::Mason::ApacheHandler', 'Apache2::RequestRec=SCALAR(0x95c5d7c)') called at -e line 0
eval {...} at -e line 0