Hi,
I'm bumping up this old thread because I think I have a similar issue: I just created an account, and I can log into the forum but once I click on the Wiki tab it still shows "not logged in".
If I try to edit a page anyway, I am identified with a blocked IP address (the one with block ID #546) although it is not mine and I never tried to edit the wiki before (and I'm 100% confident no-one else in my household either). I have no idea if I can prove my good faith but I will help pinpoint what's causing this glitch in any way I can.
I'm using firefox on a desktop ubuntu device.