The sort order of "newest" tagged questions seems to be currently broken on SO.
Maybe it's the same (or a similiar) issue as we already had in the past?
Or is it just me?
Update:
Now (about 1.5 hours later) the issue is gone for me.
I don't know what fixed the issue, but since I haven't changed anything in my SE accounts or browser, I guess it was some stale cache or whatever.
Example:
http://stackoverflow.com/questions/tagged/*http*?page=2&sort=newest&pagesize=30
Another example:
http://stackoverflow.com/questions/tagged/*magento*?sort=newest&pagesize=30