Potential bug in gitweb 1.7.2

Hi all, I recently had git/gitweb (1.7.0.4) setup on my Ubuntu 10.04 box and decided to add ppa:git-core/ppa to get up to 1.7.2. After I did so, my previously working gitweb stopped functioning and only shows a blank page. Im using apache/cgi and the following error is what I found in my apache error log:

[Sat Jul 24 23:11:41 2010] [error] [client 192.168.1.100] Can't call method "http" on an undefined value at /usr/share/gitweb/index.cgi line 3401., referer: http://192.168.1.142/gitweb/

 From the latest source:
cat -n gitweb.perl | grep 3401
   3401        if (defined $cgi->http('HTTP_ACCEPT') &&

Thanks,