The update specifies that, for optimal rendering and indexing, you should allow Googlebot access to the JavaScript, CSS, and image files used by your page.

Don’t be alarmed if you received a warning from Google in your email today — many webmasters were alerted that “Googlebot cannot access your JavaScript and/or CSS files.” Google sent out ...

incrediBILL, moderator at WebmasterWorld, noticed that one of Live Search's bots was crawling through his JavaScript. The bot is named MSNBOT-MEDIA and he noticed that it was accessing JavaScript ...