Note that we have a list of known bugs and failings on that wiki
The wiki appears to be a honey pot for spammers now. Look at the main page's history. [1]
For all those searching the instructions, please have a look at http://multimedia-alpha.wmflabs.org/wiki/index.php?title=Main_Page&oldid...
Results are always file description pages lacking the file like [2].
[1] http://multimedia-alpha.wmflabs.org/wiki/index.php?title=Main_Page&offse... [2] http://multimedia-alpha.wmflabs.org/wiki/index.php/File:Wmflabs-hackery_%28e...