Yesterday I left a masage here www.artio.net/support-forums/joomsef-fre...al-link-doesn-t-work . The only problem is that it's not visible, as it's not possible to get to page no 2 (when page 2 is clicked the content of frst page is displayed)

Hello,

thanks for info. We are already aware of this and are currently working on a fix.

Should be fixed now. Other users using Kunena forums should upgrade extension to 2.0.4 and also purge generated but unused URLs in DB. (those having hits = 0)
I generally recommend to remove little used URLs (hits < 10) from time to time.