I've found a bug where I get a 404 Error page after switching between branches in the Source view area. Here are the steps that I've taken to recreate the bug;
- View the repo (https://bitbucket.org/ghagivassilis/test-run).
- Select "Source" from the menu.
- From the 'master' branch, switch to another branch ('creative' in my repo) using the branch selection drop-down.
- Open a directory within the new branch ('Creative' in my repo).
- Switch back to the 'master' branch using the branch selection drop-down.
- 404 Error Page.
I hope this helps, if you have any questions or require me to do some further testing please let me know.