I'm not sure if this is the correct ticket - currently we are having some issues with javascript gadgets like https://commons.wikimedia.org/wiki/Help:Gadget-DelReqHandler on commons.wikimedia in the monobook skin only which maybe related to this change. Btw, gadgets in vector skin works. There is also a discussion on commons related to this topic: https://commons.wikimedia.org/wiki/Commons:Administrators%27_noticeboard#Problem_with_DelReqHandler

I (operator of wdwdbot) add this argument (transferby=wdwdbot) to the template to simple distinguish transfers done by my script from other commonstransfer. This "transferby" parameter is currently unused in the :de:template:Nowcommons.

some more files with the same issue: (file duplicates)