I am using Lucid 10.04 with KDE.

When I single click on any folder in my file browser it is behaving as a folder.

I am not able to select a folder (it always opens the folder). Right now to select I am using keyboard.

How to avoid this situation?

I saw there are some posts on this and they talk about Nvidia in all those. I don't have an NVIDIA graphics card.

Any solution for this?