Any update on this issue? Were you able to reproduce this? I would like to use your plugin but it just isn’t working right now.
Here is the full error that appears at the top of the plugin page after attempting to activate the plugin:
Plugin could not be activated because it triggered a fatal error.
This page contains the following errors:
error on line 2 at column 1: Extra content at the end of the document
Below is a rendering of the page up to the first error.
Here’s a screenshot of the error message: http://i.imgur.com/dcQeYx6.png
This is not an issue with the plugin but merely a conflict between the plugin and the theme you are using. The resolution is to either change the name of the excerpt() function in either the theme or the plugin. You should not expect him to change his code for this unless he’s feeling extra nice.