Why is the API 'posted' field changing and breaking apps?

Is plurk going to keep changing the format of the 'posted' field in the API? It's changed back and forth a couple of times in the past two days between the "%a, %d %b %Y %H:%M:%S %Z AB" format and dates like, "Sun Aug 31 08:05:31 2008"

This breaks every application using the API.

Here's a recent history of the way Plurk's been changing the API. (Just look at Aug 30th and Aug 31st.) http://plurk.dlma.com/stats.txt