YafRay Problem 2 -GAT

Can someone tell me how to fix all the things wrong in this YafRay render, plz?

http://img138.imageshack.us/my.php?image=testdd5.jpg

Those white spots along the edges, white squares where the windows are, (next to the correct once). And some other things too. Like the legs on the chairs, they are gone! :frowning:

I have 1 sun light, and 3 lamps set to.1

Thanks!

Here is the same render, but without the three lamps inside: http://img167.imageshack.us/my.php?image=testtd6.jpg

We need more info:
Screenshots to see where the light sources are
GI method used (Skydome, Full GI, Full GI + photons)

I figured it out, it was because my walls were only one plane, instead of a cube. The photons leaked out.

http://wiki.yafray.org/bin/view.pl/UserDoc/YafRayLighting