From: Trevor Parscal Sent: Tuesday, March 30, 2010 5:47 PM
[..] but switching to _ from - might start being popular anyways so a switch over might be something we could consider.
[sm] personally I very much prefer "-" over "_" in message keys, as the underscore is ambiguous in a MediaWiki: pagename context. Furthermore having a huge rename operation of keys just because we want to change the i18n implementation does not sound like a useful activity...
Siebrand