scrollpost on "[Plugin: Wp My Admin Bar] Problem accessing admin page"

I get this error

Content Encoding Error
The page you are trying to view cannot be shown because it uses an invalid or unsupported form of compression.

The plugin works I guess. i don't know what I am missing if I can't view the admin page.

Cheers
Jack

http://wordpress.org/extend/plugins/wp-my-admin-bar/