But this version was installed by the Avast normal update process, and i though that this process only installs “steady” version, not beta version.
On a PC with Vista, and Avast free, french version 8.0.1489, the Avast update windows says that the last version available is 9.0.1504 (9, not 8), so not knowing the version that would be installed, I have kept this 8.0.1489 version.

More important, are the problems discussed in this post linked to the post “Fix for WebShield download issues” (hxxp://forum.avast.com/index.php?topic=143211.75) where Lukas (avast! team Super Poster) gives some interesting information ?