Url Image preview displays gray rectangles
Bug description
I see gray rectangles in many cases instead of preview images. It happens randomly on all images. Sometimes I see partly rendered image. I tried to load an image from a disk into gtk.gdk.Pixbuf and TextViewImage. Same result. Gray rectangles.
= Software versions = OS version: Xubuntu 15.10
GTK version: 2.24.28
PyGTK version:2.24.0