(edited, do some more tests)
Any more news?
Thanks
Any conclusions yet?
Well, after 10 days of silence I’m guessing it has not proven easy for avast to dismiss the OPs claims.
Issues with the sandbox effectiveness wouldn’t be much of a problem for me. The only thing I have set up to run in the sandbox is IE9 (which I don’t use anyway).
Safezone weaknesses would be more of a concern.
Well, after 10 days of silence I'm guessing it has not proven easy for avast to dismiss the OPs claims.::) What did you expect?
At least somebody of their staff noticed. 2 weeks for a response and several months more for a fix are nothing unusual. 
The only thing I have set up to run in the sandbox is IE9 (which I don't use anyway).IE9 already has a "sandbox" when run under Vista or above. And both sandboxes amend each other very well!
I’m wondering if there might be a different way to get someting like safezone.
Run a tiny linux OS (loaded from CD) entirely in memory. No persistence for changes.
It’s certainly quick!.
Any update on this available now that a new version of avast is out?
Obviously not…
Push
(Nothing happened so far)
This was already fixed in avast7 version, thanks for report.