In earlier versions you could enter spaces in the branch name, and SourceTree would replace them with underscores automatically. This feature was really helpful, because I usually copy the name of the backlog item to use as the branch name.

The new version validates input of new branch name directly, so now I can do this anymore. I have to manually replace all spaces with underscores, and that it a bit annoying.

Can you please include space as a valid character, even if it really isn't, and do the underscore replacement as before?