MessagesXx.php contains $magicWords array of synonyms.
The group of synonyms marked to ignore case ignores the case only if all the
synonyms are ASCII, otherwise not.
Test case:
MessagesCs.php
groups 'revisionday' and 'language' work properly
groups 'uc', 'fullurl' and many others don't - uppercase works properly,
lowercase appears as red link to non-existing template
Tested on cswikipedia 1.9alpha (r17974)
Version: unspecified
Severity: normal