The signature button is inconsistent: The message wikieditor-toolbar-help-content-signaturetimestamp-syntax has ~~~~, but the js for the insertion has --~~~~. Please change it to ~~~~, because that is enough for a signature[1]. All people who love the "--" at the begin can add it to his signature in preferences.

Thanks.

[1] http://www.mediawiki.org/wiki/Help:Signatures#Default_signature_options

Version: unspecified
Severity: enhancement