I am setting up my first repository.
I named it "SVN - CATS Docs", selected type Subversion
enter bad username/password on purpose (to see if failed) and pressed validate and that worked as expected. I then fixed the username/password without closing the error message and it pressed validate. I saw Validate change to OK but the error dialog did not go away.
Then I pressed save and received the message: Name can only contain alphanumeric character without spaces. Then the save button out with a progress indicator. I then changed the name to "cats_docs" and the save button stayed in the greyed out state, so I cancelled the new repo.
I then tried to create a new repository and found that the save button was still in the greyed out / progress bar state.
I realized that the button still worked so I was able to enter the information and get the repository created.