- Flash player in pardus has problems. With all of the browsers........
Can you give a specific website (address) with flash, so that we can concentrate on this problem.
With a general remark, it's very difficult to find out if it's a general or a 'one off' problem.
http://www.youtube.com 
With the flashplayer in pardus the CPU load is about 80%, and I have two cores (AMD Athlon X2 64). With linuxmint it is about 70-71%. Both cases I used Firefox 3.6.12. On the other hand linuxmint was the 64 bit version with the 64 bit flashplayer. I am waiting for pardus 2011 64 bit and expecting better results.
I think this behavior is not the fault of pardus developers, they made quality work, I like the distro so much. There could be some hidden reasons what will be solved after some time when they have been revealed.
........ because e.g nvidia 8400M is extremely slow in playing videos (flickering, low framerate). Doesn't matter wich videoplayer you use. Some other nvidia cards (most of them) work perfectly.
I don't have any problem with my GeForce 6200 and GeForce 210 video cards.
The only right place to report this problem is
Bugzilla.
We tested two msi notebooks, one with 8400M and one with 9600M. The 8400M has problems, but 9600M works perfectly. In the meantime my brother tested debian with kde4 on the 8400M notebook and got the same result, so it is not pardus related but kwin related. 8400M with gnome+compiz does not have any problem. And yes, the problem exists with the noveau driver too.