This one time, at band camp, IvorW wrote:

This is London specific, as far as I can tell.

Version-specific, perhaps?

Page doesn't appear on:

http://london.openguides.org/kakemirror/?action=index;index_type=category;in...

Which is running 0.46 as opposed to 0.45 on the "main" London.

Also doesn't appear on http://engineer.openguides.org/