JSMin not working. Incorrect file permissions on jsmin.php

Description

When "Use Jsmin+" is not checked, there is no js_xxx.jsmin.js file in the files/js/ directory. When "Use Jsmin+" is checked, there is a js_xxx.jsmin.js file in the files/js/ directory.

Expected behavior

When "Use Jsmin+" is not, the module will still produce a js_xxx.jsmin.js file and change the page source accordingly.

Actual behavior

The js_xxx.jsmin.js and page source changes only appear when "Use JSMin+ instead of JSMin" is checked.

Repeatable

Always

Steps to repeat

1. Download and unarchive the package into the modules directory as usual
2. Enable the module as prescribed.
3. Test, toggling "Use JSMin+ instead of JSMin" on and off (saving preferences & examining file system and page source each time).

Solution

Change permissions of javascript_aggregator/jsmin.php to 755. The module will then behave as expected when "Use JSMin+ instead of JSMin" is not checked.