Profile links are not working! Now this is negative ranking factor!
But don't worry, we can still use backinks from profiles but we have to be a little bit smarter. How google knows, when this is an profile backlink or not?
It's easy - content. Profile links have only links, without content.
Add content to your profile backlinks (Bio, about me, etc.) I was doing it all the time, i know, google loves content, and i had no problems with this Panda Update. A lot of sites goes down, because they has a lot "spam" backlinks, without content, thats mean now, without value.
If you dont believe me, try to add a lot of this spam backlinks, and watch your sites go down or even kicked from serp.
Have a nice day!