I moved to Fedora 9 a couple of weeks ago. I use KDE4 as my desktop.

I am happy with F9 & KDE4.

But there are some issues:

• NetworkManager – Same problem of connecting to wireless networks – It asks me the wireless key 5-6 times to connect. I don’t know how to fix this.
• Plasma – Most of the time when I log out KDE, plasma workspace crashes. But there is no harm. All your session details are saved.
• Desktop Effects – Hmmm, I can’t make the KDE desktop effects work on my Thinkpad T42p. I don’t use any properitery driver. Most of the time system hangs when I enable desktop effects. But don’t stop. When you reboot next time (ie after enabling desktop effects) it works. The lesson is if you want to enable desktop effects(KDE) you need to a reboot
• Fonts – Fonts are not that much pleasant when compared to Fedora 8 KDE.

Ok, enough complaints. What do I like in F9?

• Fast XStartup – Really fast!
• Firefox 3 – Good session management, download resume.
• KDE4

Another problem I have seen with flash plugin in Firefox is that there is no sound. You need to install libflashsupport. Thanks to this blog