When I edit the wiki all the changes are visible right away but to others only after a day or so, if someone logs in to the wiki using a non-steam account he can see the changes right away but the public sees the page from a day or two ago. Some non-steam accounts can't see the changes, one of my guild members used his non steam account to try and view the new content and couldn't but another one could, the account that couldn't view the changes didn't confirm its email and the one that could had it confirmed, after the account without the unconfirmed email confirmed it, it was able to see the changes. Hope that little bit of info helps in solving this problem faster. As for the steam accounts, those are always bugged LOL, I didn't even try those :-)
Also when I try to upload a newer version of an existing image something strange happens, I upload a image that is different then the one on the wiki but the wiki displays the new image exactly the same as the old one, then when I try to do it again it shows that I uploaded the new image but that the current image is still the old one, when I try to revert the current image to one of those that I myself uploaded it shows that the current image is the old one but on the right side of it it says that its reverted to one of the new ones. What I want to say is, what ever I do, I cant update a picture, I tried doing so for a few images but here are 2 examples:
http://wiki.spiralknights.com/File:Bisento.png
http://wiki.spiralknights.com/File:Equipment-Shadowsun_Slicker_Stats.png
One more thing, when I tried to upload the same image with a different name to wiki, image called Bisento2.png ( renamed image from Bisento.png that I previously used to update the old picture ) and I was going to use it at the same place I used Bisento.png it recognized the image and told me that it's a duplicate but when it displayed the image that's already on the server it displayed a different image, it displayed the old image of Bisento that I tried to update with this new one, so I guess that somewhere in wiki there is an error that always displays the old image as the current one no matter that the wiki sees, that the new one is actually new it still displays the old one on all the pages referencing that image and as the current image on the image's page.
This is a long time issue that's been plaguing wiki users. See here