this bug has been reported to gnome bugzilla and fixed in CVS: http://bugzilla.gnome.org/show_bug.cgi?id=170258.
Created attachment 53429 [details, diff] file-roller-2.10.0-namefile-fix.patch I grabbed this patch from gnome CVS. I just compiled file-roller and everything seems ok.
Added to cvs. Thanks for tracking this, much appreciated.