I am facing a problem when using custom themes in ubuntu 14.04 unity interface, such as the mbuntu-y theme appearing in the screenshot attached, as you can see the background of nautilus window goes black sometimes when using custom themes, this does not happen when I use Ambiance or Radiance themes.. I have to switch the view to list view and then back to icon view to get the white background again, the same thing occurs when using the nemo file browser..
I haven't been lucky on my search for a solution, I only found this: https://askubuntu.com/questions/552075/background-of-nautilus-go-black
Please advice on the source of this problem, and on how to solve it..
Thanks in advance :)