[pmwiki-users] Unexpected dead wiki link

[Niklaus Kuehnis]

I'm using pmwiki-2.2.0-beta65.

I have two pages:
Spiel.Vorwärts-schildern
Spiel.Vorwärts-rückwärts

[[Vorwärts - rückwärts]] is a valid wiki link.

but

[[Vorwärts - schildern]] is a dead wiki link (underlined with 
question-mark). I would have expected this to be equivalent to 
[[Vorwärts-schildern]].

What's wrong here?

Thanks in advance!

-- 
Niklaus Kuehnis