Google sent Wired a response that read:
It turns out there was a bug, a specific bug, that affected search within a specific group. That bug is something we’re working on fixing, and I think that will be fixed by tomorrow. Thanks for writing this, because that’s how we discovered this specific bug.
Wired confirmed the fix is actually working, but there are still some issues with searching by date ranges. Google acknowledged that issue and said they are working on a fix. Why did it take Google over a year to fix the issue? Supposedly, Wired embarrassed them into fixing it. All it took was a day of some engineering time to get it done. Wired did note that Slashdot wrote about the issue 11 months ago.