I've searched the forums and cvs and wasted hours on this already. Existing wiki's and new wiki's result in this error: Headers already sent.
I've tried all the tips about checking files for spaces and extra lines, I've changed to the basic standard theme and have the same problem on both a 1.8 weekly build and a 1.9.6 weekly build. At the moment I'm trying to fix this on a 1.9.6 copy. Any suggestions?