You will notice following things, but believe me, nothing is wrong and everything works exactly as it should work. It works exactly the same way as it used to work with all other skins and all other buttons/icons. Well, I better start with that little explanation... huuuuh...
First of all, When you click at LOCAL DISKS arrow (blue dropdown), you dropdown menu will slide down. When you click it again, normal behaviour is that menu will slide up, in other words, close itself... OK...
When you click at REMOVABLE MEDIA arrow, both dropdown menues will slide down. When you click it again, both menues will close itself. That's normal, because both menue are talking about removable media, right ?
OK, all panels are closed now... Let's mention another situation - if you press LOCAL DISK arrow, dropdown menu will slide down. Do NOT close it, leave it open... now press, REMOVABLE MEDIA again. Removable Media dropdown menu will slide down too. Now we have both menues open and visible on the screen, right ? If you try just to close first one (top one) LOCAL DISKS, you won't be able to do that... actually, you can change the status of what you want to be scanned (take a look at display area, Scan Local Drives is changing from ON to OFF), but you won't be able to close that dropdown menu... why ? It's completely normal. Because REMOVABLE MEDIA is last one that was activated.
If you press REMOVABLE MEDIA arrow, you'll close both dropdown menues, unless you pressed LOCAL DISKS in the mean time and set Scan Local Drives to ON (take a look at display area again). If that is set to ON, then only REMOVABLE MEDIA dropdown menu will close itself. Again, why ? Because you activated LOCAL DISKS scanning. Logicaly.
OK, I covered those two dropdown menues. What about third one, RESIDENT SCANNER ? OK, that one works pretty much independetly from those two I explained up there... you can make that dropdown menu show itself if you press on that little blue dropdown button (Mac styled arrow), but you can not close the menu same way. Why ? I don't know, but it's been always like that... since avast! was born, hehe

Anyway... that menue reacts to user actions in a little bit different way. Menu will be open as long as you hover with your mouse pointer over that menu. As soon as you move your mouse little bit further from the menu, that will invike closing of RESIDENT SCANNER drop down menu.
So, nothing is wrong, everything works perfectly, I just felt I should give a little (haha, this one is good... a little

) explanation why and how everything works. Remember people, this is not just when it comes to this skin. It's with all skins no matter who made them, and it's been always like that, even with default icon commands which can be found in every and each skin.
Thanks for reading this, I just hope it will be useful and helpful to some.
Regards!
Sasha