danny.leinad wrote:

Threads should be moved using [[Special:MoveThread]].

BTW [[Special:MovePage]] and [[Special:MoveThread]] should be merged or disabled ability to move threads using [[Special:MovePage]].

[[Special:MoveThread]] doesn't let us to make that kind of movement. If we try to move e.g.
"Thread:Namespace:Page/Blah" to
"Thread:Namespace:Page/Test"
it says

"There are problems with some of your input
(...)
The destination page is not a discussion page."

And if instead I use "Change subject", we get in recentchanges something like:

(Threaded discussion log); 00:00 . . UserName (Talk | contribs | block) changed the subject of Thread:Namespace:Page/Blah from "Blah" to "Test"

i.e., only the subject is changed, not the page name "Blah". This makes the page [[Thread:Namespace:Page/Blah]] to show "Test" in the first header, but doesn't change it's URL. Besides if someone types "Thread:Namespace:Page/Test" in the search box, it won't get the desired page.

So, yes. The functionalities of both special pages ([[Special:MovePage]] and [[Special:MoveThread]]) should probably be merged to avoid confusion like this.

Bug 25866 seems to be related.

No activity in one year. Marking as "Lowest" to reflect what seems to be the case. Feel free to correct.