Thread:Project:Support desk/Gadget scripts missing after migration without upgrade/reply

The problem of "missing" pages -- some that exist with the literal ":" in the name -- is usually caused by old pages conflicting with new namespaces.

For example, if you start your wiki with pages like "Meta:Foo" and "Meta:Bar", it works great... until you decide to create a "Meta" namespace.

See Dealing with existing pages for this.