You can block Google Web Accelerator from speeding up pages from a particular subdomain (for example, www.somesite.com) or from an entire domain (for example, othersite.com, including any subdomains it might have, such as mail.othersite.com, www.othersite.com, news.othersite.com, etc).

To block a specific domain from being accelerated, enter its name (without a leading http://) in the Don't Accelerate These Sites preference's text area. For example, to block www.firstdomain.com and mail.seconddomain.com, just type those names in the text area, each on a separate line, and click the Save Preferences button. You can also block a domain by selecting the Don't accelerate this website toolbar menu item when you visit the website in question.

To block all subdomains at a particular site, just enter a "." followed by the common part of the domain name. For example, to block all subdomains at domain.com, just enter ".domain.com" on a separate line and click the Save Preferences button.

When your browser shows a blocked site, you'll see:

• The toolbar menu item Don't accelerate this website has a checkmark next to it.
• The browser speedometer icon is grayed out:

To unblock a domain, you can delete its entry from the Don't Accelerate These Sites text box and click the Save Preferences button, or uncheck the Don't accelerate this website toolbar menu item.