Version: unspecified (using KDE 4.6.2) OS: Linux The optimal resolution of my laptop is 1366 x 768. After connecting an external monitor and disconnecting it, now the right side of the panel is not visible, including the clock, notification area, etc. The task manager takes all the space up to the right border. Switching the resolution to 1360 x 768 fixes it, but the fonts look blurry at that resolution, so it is not a solution. Reproducible: Always
I found a fix. Delete the panel and create a new default one. You lose all your customizations but I managed to customize it again and not suffer from the same problem. Let's see what happens when I connect an external monitor again.
I cannot reproduce this anymore.