How to access screensaver settings and change app icon size and grid size in GNOME 3.2

Hi everybody,

I am pretty new to openSUSE and just installed 11.4 with GNOME 2 successfully 5 weeks ago. Later I added the KDE environment (as it looks much better). Yesterday I updated to 12.1 and now (GNOME 3.2) I cannot find screensaver settings or a way to change the icon size and the grid size in the Application view. Apart from that GNOME 3.2 works like a treat. Can anyone please help???

Also, KDE won’t start properly, default panel is missing, and it crashes if I want to add the panel and also windows I opened do not disappear entirely???

Many thanks for tips how to get both issues fixed!