One thing I discovered is that template usages in 1.8.2 and
1.9.0 now
require correctly matching title case. This was not the
case in 1.4.12.
I'm quite sure this has *always* been the case.
MediaWiki doesn't have any sort of case-insensitive title matching (except for the first letter when set to capitalize titles, as default).
Hmm, this is very odd.
This template: http://developer.valvesoftware.com/wiki/Template:KV_Targetname is used as {{kv_targetname}} On this page: http://developer.valvesoftware.com/wiki/Path_corner (under the "Keyvalues" section).
And it works. We have a large number of other links on the server that are also this way.
On the 1.9 test server, the above link is broken until I switch it to {{KV Targetname}}.
Production server: MediaWiki (http://wikipedia.sf.net/): 1.4.12 PHP (http://www.php.net/): 4.3.10-18 (apache) MySQL (http://www.mysql.com/): 4.0.24_Debian-10sarge2-log
And (I believe) Apache 1.333. I can't check easily at the moment.