As a long-time GNOME user, I had to overcome some initial learning curve to the KDE4 desktop environment. My first puzzlement is how to re-position icons on the desktop.
I tried to click and drag the icon. However, clicking the icon immediately runs the associated application. That was not my intention.
Be careful to only click the background of the side panel, not any item on the panel. Clicking an item on the panel will execute the associated action, such as removing the icon, but will not relocate the icon.
While the technique may not be that intuitive to many users, I do not consider it a show stopper to using KDE4. For me, the jury is still out on whether to use KDE4 regularly.
Please share any pointer to help GNOME users to get comfortable with KDE4.