Browser refresh not working: "Cannot open Browser Refresh.sublime-package"

I'm running Sublime Text 3 build 3059 on OS X 10.9.1, and installed Browser Refresh 0.3.0 via Package Control. At some point within the last week, my trusty Browser Refresh keyboard shortcut stopped refreshing my browser. If I have `auto_save` enabled, the current file will save, but the actual part where the browser refreshes does not occur, regardless of `browser_name`. Also, I get this error in the ST console:

```
Traceback (most recent call last):
File "/Applications/Sublime Text.app/Contents/MacOS/sublime_plugin.py", line 543, in run_
return self.run(edit, **args)
File "BrowserRefresh in /Users/trevor/Library/Application Support/Sublime Text 3/Installed Packages/Browser Refresh.sublime-package", line 34, in run
zipimport.ZipImportError: bad local file header in /Users/trevor/Library/Application Support/Sublime Text 3/Installed Packages/Browser Refresh.sublime-package
```

I've tries reinstalling the package with Package Control. I've also tried manually installing it by cloning the repo, in which case the traceback changes slightly:

```
Traceback (most recent call last):
File "/Applications/Sublime Text.app/Contents/MacOS/sublime_plugin.py", line 543, in run_
return self.run(edit, **args)
File "/Users/trevor/Library/Application Support/Sublime Text 3/Packages/Browser Refresh/BrowserRefresh.py", line 34, in run
from mac import MacBrowserRefresh
File "", line 1558, in _find_and_load
File "", line 1525, in _find_and_load_unlocked
OSError: zipimport: can not open file /Users/trevor/Library/Application Support/Sublime Text 3/Installed Packages/Browser Refresh.sublime-package
```

Checking out an older Browser Refresh commit does not help. Something else must have changed, but I can't think of anything in my setup that could have affected it. Any ideas?