Content Encoding Errors when trying to use main page or log into Steam.

This keeps happening from time to time for me; when I try to go to the main page or log in, it redirects me to an error page; A content encoding error.

It apparently happens when a web site is presented with one content encoding header of one type, then encoding the data differently.

As a result, I’m completely blocked out of being able to download from Garrysmod.org.

Is there anything I can do to fix it?