Last modified: 2014-04-08 08:59:51 UTC
1. It is not obvious what regular expression syntax is provided.
2. It is not obvious what component is responsible for the existence of the dialog box in the first place.
3. Even those clever individuals who get as far as [[mw:Extension:WikiEditor]] probably won't be able to find user-level documentation; all I can see is about how to install it or how to add toolbar buttons and such.