[Plugin: W3 Total Cache] Admin Page Error / White Screen

Hey There,

I’ve got W3TC 0.9.2.4 installed on my site.

I went on it this morning to tweak some minify settings and was unable to access the admin section for W3TC. All i got was the admin sidebar, and the rest of the screen was white.

I turned on debug mode and got the following error – “Fatal error: Call to undefined method W3_Plugin_PgCacheAdmin::check_rules_legacy() in /htdocs/wp-content/plugins/w3-total-cache/lib/W3/Plugin/TotalCacheAdmin.php on line 858”

Having checked this file, i made a small change which basically checks to make sure the method exists before calling it. This fixed the error and now means i can access the W3TC admin pages.

/* Add By Mike*/
if ($this->_config->get_boolean('notes.pgcache_rules_legacy') && method_exists($w3_plugin_pgcache, 'check_rules_legacy')) {
	if(@$w3_plugin_pgcache->check_rules_legacy()){
		$this->_errors[] = sprintf('Legacy Page Cache rewrite rules have been found. To remove them manually, edit the configuration file (<strong>%s</strong>) and remove all lines between and including <strong>%s</strong> and <strong>%s</strong> markers inclusive. Or if permission allow this can be done automatically, by clicking here: %s. %s', w3_get_pgcache_rules_core_path(), W3TC_MARKER_BEGIN_PGCACHE_LEGACY, W3TC_MARKER_END_PGCACHE_LEGACY, $this->button_link('auto-remove', wp_nonce_url(sprintf('admin.php?page=%s&w3tc_pgcache_remove_rules_legacy', $this->_page), 'w3tc')), $this->button_hide_note('Hide this message', 'pgcache_rules_legacy'));
	}
}
/* End Added By Mike */

Could someone shed some light as to what this method actually does, and what consequences my “fix” will have?

I would also appreciate any insight as to what might have caused this problem in the first place.

WordPress Version – 3.3.1

My Plugins

• Breadcrumb NavXT – 4.0.2
• BWP Google XML Sitemaps – 1.2.0
• Comment Link Manager – 1.1
• FancyBox for WordPress -3.0.1
• Fast Secure Contact Form – 3.1.4.1
• Newsletter – 2.5.2.6
• Relevanssi – 2.9.14
• Storefront Insights – 1.1
• W3 Total Cache – 0.9.2.4
• WP-PageNavi – 2.82
• WP e-Commerce – 3.8.7.6.2
• WP E-Commerce Weight & Destination Shipping Modules – 4.4

Thanks in advance

http://wordpress.org/extend/plugins/w3-total-cache/