I use this wiki on my skyeye opensource project:
http://skyeye.sourceforge.net/wiki/HomePage
I got some problem with user login functions.

1. For testing, I signed up more than two usernames form my pc, sometimes wiki confused, I use one username to login whereas it displays my another username. It helps if I clear my browser cookie manually.

2. one user email me said he need find lost password, but it seems the lost password finding page doesn't work. He put is username in, but he never received temporary password. Does it cause by server end setting? it anything specially I need to set on server end?

I remember some other users reported issues with logging in/out at SF, the way cookies and sessions are currently handled is not very effective and should be improved in future releases.

As for the lost password, make sure your server has PHP mailing functions enabled.

I'm having issues logging out users.

when i try to logout, it gives me "This page doesn't exist yet. Maybe you want to create it?"

any ideas?

Your base_url and rewrite_mode settings in the Wikka config file are probably incorrect. See http://wikkawiki.org/ModRewrite. This question should be copied to the Wikka F.A.Q.

did that.