Last modified: 2007-03-21 20:59:20 UTC
I noticed it has changed format slightly (which I assume is an upgrade ) but it is not letting me go back further than yesterday.
Please provide details of this "format change" - what it looks like now, and what it used to look like. Is the watchlist showing more than one change per page? If so, check user preferences and switch off the expanded watchlist option (assuming this is not desired). The amount of data watchlists provide at a given time is limited partly for performance reasons, and partly to avoid swamping users with tons of data.
Seems to work back to 7 days for me. Resolving WORKSFORME; reopen and add more information if the problem persists.