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narrowboater - 10:33 am on Jul 13, 2008 (gmt 0)
I know that the pages have been re-crawled and cached, but it hasn't made any difference to the sitelinks. They seem to be 'stuck'.
In our case, Google gave us a bunch of sitelinks (great) but then gave them goofy names which were strange edits of the pages' title tags (not so great). A few weeks ago I edited the title tags so that they were short enough to be used as sitelinks in their entirety, and would also make more sense to Google users.