Creating repos and PRs no longer works and "Recent activity" feed no longer shows times on Safari on Mac OS X 10.9.5 (BB-15858)

When viewing a repo on the Bitbucket, the "recent activity" list to the right side no longer shows times for the commits on this list. Creating repos seems to be broken on Safari as well.

This can be reproduced on Safari on Mac OS X 10.9.5. The time seems to show on Chrome and Firefox though.

Update: Seems there are some are JS bugs, which are causing JS actions not to work work at all (E.g: PR viewing and merging, repo creation)