Last modified: 2010-05-15 15:51:39 UTC
Is this necessary?? I found this when using 1.10rc that I downloaded from http://download.wikimedia.org/mediawiki/1.10/ I can understand there being the need for an edit summary in the upload, move, import, bot status, block, protection and deletion logs, but for the user rights one this seems a bit strange - why was this added? Perhaps by default it could be greyed out, then ticked to enable an edit summary... I'm not really sure of the purpose of this one, though.
See bug 9693: Request a comment box for user right change through Special:Makesysop Leave the field free if you do not need a comment.
Not a bug.