An example of how to prevent Woo Canvas from breaking the excerpts on EE archive list pages.

ee-site-specific-plugin.php

<?php
/*
Plugin Name: Event Espresso site specific functions
Description: Add custom functions for Event Espresso to this plugin.
/* Begin Adding Functions Below This Line; Do not include an opening PHP tag as this sample code already includes one! */
function ee_remove_woo_remove_dropcap_from_excerpts() {

	if ( is_post_type_archive( 'espresso_events' ) ) {
		remove_filter( 'get_the_excerpt', 'woo_remove_dropcap_from_excerpts' );
	}
}
add_action( 'template_redirect', 'ee_remove_woo_remove_dropcap_from_excerpts' );