No problems with IE11 or Edge here
Using Internet Explorer 11 and Firefox 40.02
tested in both load normally there is no problem.
system
43
Same with freshly installed Firefox 40.02, virus definition version 150822-0
https://www.dropbox.com/s/uk6q5ha1p5anyv4/Screenshot%202015-08-23%2009.11.11.png?dl=0
HonzaZ, please check.
Regards,
Drazen
HonzaZ
44
I have no idea why it appears as malicious. The URL is definitely not blocked now. Perhaps it is still in the cache somewhere? Did you try restarting your PC?
Rest assured that your visitors do not see any warnings now, as Essexboy and Jefferson confirmed 
system
45
It should not be in any cache since this is fresh install of Firefox 40.02.
Restarting the PC helped 
Regards,
Drazen
HonzaZ
46
I was thinking more about cache of Avast - when it blocks something and sees it for the second time in a short while, it blocks it automatically without actually checking it. Of course this “short while” is set for a sufficient short amount of time: after a couple of minutes (?) the cache is invalidated. Perhaps there is a bug that prevented invalidating Avast cache in your specific case, therefore Avast didn’t bother to check if it is blocked and fetched last result, which is “block this URL”.
I am glad this is now resolved ;-)!