Css redirect to other css file after logging out. Bug? I have styled the class .tab-content and it works fine whenever i logged in, but i logged out then the css file is changed to a different file as you can see on the screenshoots below. I have ran drush cc all and drush cron as well as I don't have boost module installed. Do you have any idea to fixed this?

when i login  

when i logout
Drupal serves aggregated CSS. If one or more CSS files are not available (or required) for anonymous users they are not included in the aggregated file for the sake of a smaller file size. This file can obviously not be saved with the same name.

If you disable CSS aggregation (Configuration > Performance), you can see all individual files and this might explain the difference.