Emailed Author: ## Generic function names
Currently you have very generic function names that are likely to conflict with functions from other plugins or themes.
Every function in your plugin should be prefixed with a prefix that is unique to your plugin.
For example, if your plugin is called "Easy Custom Post Types", then you might prefix your functions with ecpt_{your function name here}.
my_filter_head() is too generic.
When you've corrected your code, reply to this email with the updated code attached as a zip, or provide a link to the new code for us to review.