If you try to assign a property value with #set like {{#set: Something=4+4=8}} it won't work because of the "=" in the string. It does work well with [[Something::4+4=8]].

I can't see any reason why the rule shouldn't be that the only the first "=" has a meaning and all further "=" will be interpreted as a part of the value.

Version: unspecified
Severity: major
URL: http://sandbox.semantic-mediawiki.org/wiki/SetTestPage