You can revert back to v8.0.1497 but I would NOT recommend it.

If you’ve tried a reinstall of v9 [as you stated], you shouldn’t get corrupt downloads. Regarding the website pictures not displaying, you could try disabling the Avast Online Security plugin (AOS)?

  1. Download Avastclear, Rejzors uninstall tool and the appropriate Avast program edition

Avast 8.0.1497 : http://www.filehippo.com/download_avast_antivirus/download/0c203d8e8244458c5da81998eb76f523/

Avastclear : http://files.avast.com/iavs9x/avastclear.exe
Rejzors Uninstall tool: http://rejzor.wordpress.com/avast-cleanup-tool/

  1. Uninstall Avast by control panel [If you don’t have Avast in control Panel go to #4]
  2. Uninstall in safe mode using Avastclear.
  3. Run Rejzors Uninstall Utility in Normal Mode (removes traces avastclear doesn’t) - reboot.
  4. Install the version you downloaded.
  5. Reboot.

Note : Once installed make sure you change program update TO MANUAL.