Wikimedia Bugzilla is closed!

MW 1.7.1
SMW 1.6.0
SRF 1.6.0

When using a query like the following:

{{#ask: [[Category:Shiny Happy People]]
  |?Category
  |format=tagcloud
}}

I get results like "[[:Category:Moonies]]", "[[:Category:Idiots]]", et cetera, rather than actual links to those categories.

I'm not using "link=none" -- in fact, I tried with "link=all" to see if that would fix it.  I haven't set any strange options for either SMW or SRF, and none of the options are holdovers from previous versions.  The only unconventional setting I use is that properties are "String" by default, not "Page".

I've used different formats (list, for example) and the category links are formatted correctly.  

This is a fresh installation on a test wiki.  Unfortunately, it's not accessible to the greater internet.

I'll be somewhat busy tonight, or else I'd try to track down precisely where the problem occurs.  I will, however, be available to respond.

This is a quite odd problem, and the Sandbox wiki doesn't seem to have it.  It's likely due to something stupid I'm doing... but since I haven't changed any settings or code, I'm a bit puzzled.