Avast webshield not working properly

I have received a spam in my yahoo mail which contained a virus.
while downloading(chrome 17 as the browser) the webshield warned and said the malware is blocked:

http://www.avast.com/lp-security-information-fp2?p_ext=&utm_campaign=Virus_alert&utm_source=prg_fav_70_0&utm_medium=prg_systray&utm_content=.%2Ffa%2Fen-ww%2Fvirus-alert-challenger2&p_vir=Win32:Ufraie-J&p_prc=&p_obj=&p_var=.%2Ffa%2Fen-ww%2Fvirus-alert-default2&p_pro=0&p_vep=7&p_ves=0&p_lqa=0&p_lsu=24&p_lst=0&p_lex=369&p_lng=en&p_lid=en-ww&p_elm=7&p_vbd=1407

but surprisingly the download process was not terminated and the malware(which was in a zipped file)come through my MY DOCUMENTS!!!
scanning the file showed the virus was there,it was not harmful because it was in a zipped file but the webshield could not block the download process
I dont know if it is a bug or I have to change the setting(set by default)
I m using avast 7 free 7.0.1407
Win7 home premium 64bit

 

I assume the file was truncated though?
Yes, if your browser doesn't delete interrupted downloads, there's not much the http scanner can do about that...

 

Update:
I downloaded the file 8 times(its size is 27.3kb)
5 times the webshield warned before the download process and it was blocked properly
3 times the webshield warned after the browser stated to download and the file got through and webshield just warned,no actual blocking!!!
I think this is the bug,I hope avst will fix it

 

Wasn't it coming from the browser cache then? Web Shield only sits on the HTTP layer...

 

well
I dont know my friend (I m not that expert)
All I know is that the file came through and sat on MY DOCUMENTS/DOWNLOAD
to find out the case there is 2 way:
1-send me your email(in a private mess.) and I will forward the mail to you,if you want

2-I have submitted the ticket in avast support center:
https://support.avast.com/index.php?_m=tickets&_a=viewticket&ticketid=2654986

download the file,send it from one of your mail to another,then download it from secondary email

I have started the same topic here:http://forum.avast.com/index.php?topic=94344.msg752452#msg752452

 

Are you using AdMuncher by any chance? If you are that could be the reason the file was still downloaded. AdMuncher acts as a proxy and prevents the WebShield from blocking the download as it should. It's a known incompatibility.

 

No Sir
But thanks for the information