Toby Bartels wrote:
If creating an article myself, I'd place it at a title with the umlaut. But I doubt that I'd move an article that was placed somewhere else (especially for old place names, which often have English "translations" that are more than mere *transliterations* into English orthography). The really important thing is what Dan said: Create redirects! Unless the naming conventions address a situation explicitly (and often even when they do), then one should create redirects from any title that might reasonably be linked to.
I agree with Dan and with you, that redirects are important. But some people have been very busy with moving articles, so one half is now placed under Ä and the other half under AE, which is rather unsatisfying. I am not in favour of one option or the other, I just would like to have clarity. In the present condition one could think, that the correct spelling of one place is AE and of the other place is Ä.
(Here I'm assuming that the city's name is really "Saßnitz" in German. I'm not sure if it is! I wasn't able to find a clear example.)
It is.
Mirko