Last modified: 2011-03-13 18:04:34 UTC
A MediaWiki feature has recently been activated on dewiki, that displays a warning if the summary is not filled in. However, this should only be done in namespace 0 (article namespace), where summaries are needed. However, in all other namespaces summaries are generally not needed. Therefore, the warning in MediaWiki:Missingsummary should only be displayed in namespace 0.
It seems the software doesn't have this functionality yet. To avoid mixing up Wikimedia configuration requests and regular bug reports, I opened bug 18052 and marked this one as RESOLVED LATER.