Links to other wiki pages do not work in Preview

Steps to reproduce:

1. Create a Wiki page called "Test" and save it.
2. Create a second page, or edit some other existing page.
3. In the edit window of that page, type [Test](Test)
4. Click the "Preview" button at the top right of the edit box
5. Click the "Test" link on the preview pane

Result:

Clicking the "Test" link generates a 404. (The link on the Preview pane is of the form https://bitbucket.org/user/project/src/df8d5ebbf1ef66bb2b12e9685e489b4907158a96/Test)

Expected Result:

Clicking the "Test" link would take me to the "Test" page (i.e. the link would be of the form https://bitbucket.org/user/project/wiki/Test)

Impact:

Likely only a problem for new users, as people will figure this out and move on. But it's hard enough to figure out how you're supposed to format internal links to other wiki pages (I learned by trial and error--I didn't see instructions on this in any of the documentation), so it's probably not a good idea to have this additional barrier to learning by experimentation.