After a mention in another post I have a "strange-feeling" the way Avast logs events.
In the settings off the logging system you are able to define what Avast should log,... => Errors, Info, Critical,... ect,....
So the way i see it: If you set the arrow on "errors" avast only log Errors,...and no info, virusattacks,...

So it logs stuff,...but just one thing,....
Personally I think it would be
much better just to work with the same method we can find back in the " On-Access-control-thing"
=> Normal - High - Customize
Normal: only the most common used: Virus attacks, critic errors,...
High: Virus attacks, critic errors, Info,...
Customize: using some sort of "listbox" where you can choose what avast should log and what not,....
I base my theorie on something I just had: I got a warning from an email with "iframe"-stuff or something like that,...Avast called it dangerous,... but the log file showed completely empty,....
So i think the log system is something that should be more "enhanced"
Another thing i have noticed is that there is no scrollbar so one icon is not visible,....=> see screenshot.
hope i can make my point

I am using Avast-Home edition - latest version availabe