Apache2 problem - Ubuntu 11.10

[Roger]

I had noticed over past days that calling web pages from localhost seems 
to take longer, sometimes around 10-15 seconds or more.
I installed django on Friday but it did not work so uninstalled and 
removed residual files.
Now calling localhost or 127.0.0.1 gives blank browser.

/var/log/apache2/error.log reports:
[Sun Oct 23 10:58:46 2011] [notice] child pid 15731 exit signal 
Segmentation fault (11)
[Sun Oct 23 10:58:46 2011] [notice] child pid 15732 exit signal 
Segmentation fault (11)
[Sun Oct 23 10:58:46 2011] [notice] child pid 15733 exit signal 
Segmentation fault (11)

I can access our server pages and google is ok.
No help from google on segmentation fault that I could find.

Can anyone advise me why this happens to localhost, what I should be 
aware of and how to fix please.
Thanks in advance
Roger