Version: KDE 4.4.2 (using KDE 4.4.1) Compiler: gcc 4.4.3 OS: Linux Installed from: Archlinux Packages It looks like a graphics bug. Instead of black screen it shows my desktop, possibly with some graphics artifacts (imagine a graphics buffer, that has not been cleared and parts of it has been used afterwards for other things - that is how it looks like). Also it doesn't appear immediately - usually after some time. This is not a huge problem, but it is privacy disclosure anyway. P.S. Using NVIDIA binary drivers on Arch Linux x86_64.
*** This bug has been marked as a duplicate of bug 162178 ***