I didn't realise my google home page had been hijacked to a google clone..www.about.blank.org.
Sneaky. And I have tons of protection running.. Hrmmm
I had the "about blank" problem too until I switched browsers. Any time I rebooted I got "about blank" as my home page. I could change it but it would always come back upon rebooting. I finally got rid of it but I have no problems at all using netscape 7.1 browser.