User blog comment:Rappy 4187/Technical Update: February 25, 2014/@comment-4784321-20140225210856

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 * Forums and Message Wall threads were not always showing the latest content. This fix is already live.
 * Images with names containing '?' (and certain other special characters) had broken thumbnails. This fix is already live.
 * New user accounts were not listed in Special:Log/newusers. This fix is already live.

Nice, thanks! :)