I think there might be an issue in the backlinks calculation in ikiwiki 3.04.
I've just migrated to 3.04. In doing so, the following pagespec
"log/ and !link(tag/aggregation) and !link(tag/draft) and !/Discussion"
...started matching pages which contained
The page templates/draft.mdwn contains (amongst some markup)
[[!tag draft ]]
Prior to migration, the pagespec definitely took effect post-transclusion.
An example: http://jmtd.net/log/too_much_debconf_a_bad_thing/ contains the template inclusion, which can be seen to have worked due to markup at the bottom of the page. It even includes a "Tags: draft" link at the bottom.
Strangely, http://jmtd.net/tag/draft/ does not contain backlinks to pages which are tagged using the procedure above.
After the first rebuild, it's broken, after a subsequent refresh, it is fixed. I've reproduced this twice (but assumed I'd done something wrong the first time, so went ahead and migrated live, spamming planet debian in the process :(). I will try and put together a testcase. -- Jon, 2009/02/17