Last modified: 2011-07-12 03:51:01 UTC
When a wiki article has a list of (linked) dates, the dynamic dates feature may parse the dates incorrectly, resulting in confusing output. The URL I provided above demonstrates the issue (the list is borrowed from an old version of [[en:Old Style and New Style dates]]). The problem seems to stem from the parser preferring to match "[[YYYY]], [DD MMMM]]" over "[[DD MMMM]], [[YYYY]]".
This appears to work now, see http://test.wikipedia.org/wiki/Bug_6974 Dynamic dates must be disabled on enwp, I couldn't get them to change at all on your example. However, all formats appear to work correctly for the copy on testwiki. Closing worksforme.