User blog comment:DaNASCAT/Technical Update: April 16, 2013/@comment-5319459-20130417141715

Galleries seem to have got slightly broken with this update.

Clicking on a gallery image, that is linked to a wiki page, will open an overlay saying... Oops. This item is no longer available, but now that you're here, explore the Tekkit Lite Wiki!

However, right clicking on the image and selecting 'open link in new tab' will work just fine.

I'm assuming that it is not intentional :D