When trying to change the commit point of a source file, the drop-down appears after clicking on the current commit button as usual. However, the loading image is displayed but not replaced with a list of commit points for that file. This happens in Source and Diff pages the majority of the time i attempt to use it.
After looking at the console log i have found this error: "Uncaught TypeError: Cannot read property '1' of null" after trying to select a new commit point.
I am using a Windows 8 PC running Google Chrome Version 28.0.1500.72 m. This isn't a major issue however it does limit the functionality of some of Bitbucket's features.