Version: (using Devel) Installed from: Compiled sources With desktop effects enabled most of the dashboard on my primary screen has a white background and on my secondary screen has no dashboard at all. See attached screenshot. With desktop effects disabled I get bug 155808. OpenGL on nVidia.
Created attachment 25353 [details] Dashboard display bug
dashboard only shows on the screen you have the cursor on. as for the white background, that's a composition problem.. not much that can be done in plasma about it.
Created attachment 74661 [details] Desktop cube while dashboard is still visible
If you Alt-Tab away from the dashboard, the blur-effect still stays on, but it's noticeably lighter than before. It'd make sense to just disable Alt-Tab completely, else some wierd things (screenshot attached) will be appearing again and again.