What did you do to cause this? creating a wiki page with spaces in page title and copied page title to slug
What page were you on? wiki
What PHP and MySQL versions do you run?
Describe the defect: after clicking "create" the wiki page is created with spaces, but linking and the redirect after creation are not working, invalid chars should be stripped (or replaced by valid ones) before submitting (like in creating a project)
In 3.2, spaces will be replaced by an underscore, however the whole idea of being able to manually set the slug is to allow people to use their own judgement when setting it instead of forcing upon them a very specific way.
version used is 3.1.3