I've just bought a new PC and installed a copy of InDesign CS4 on it. All seemed well until I started looking through some of my previous files and noticed that I was unable to select certain options, usually in the right-hand panel section.
I couldn't for example, select any paragraph styles in my documents, or character styles. Or select a colour from the swatch panel. While I could use the paragraph formatting tab to alter font sizes etc., I couldn't select anything in the paragraph styles tab. I might as well have been clicking on a screengrab of the page for all the notice that InDesign was taking.
Even if I selected "create new style" (that at least was working) I couldn't then select the new style to apply it to some text.
In page navigation at the bottom, the drop down page menu wasn't working, nor was page manification, but I could move between pages using the back/forward buttons.
Thinking this was a CS4 problem, I installed CS3 on the machine as a test. Almost exactly the same problems resulted. Other parts of the CS4 suite seem unaffected.
I'm usiing Vista Home Premiun 64 bit as my OS.