Hi DavidR and others,
Just to let you know that I'm also having the problem even after the latest update. I have exactly the same symptoms as Gandalf, however as stated before my ATITOOL and BiTMeter icons are still missing, although they all appeared once after a reboot the other day but have stayed away 10 or so reboots since.
The programs are all loading as I see them listed in the processes tree.
Still love avast as I have done for years and this is the only problem albeit small I have ever had.
Cheers and thanks for your time.