We've recently upgraded to 1.13 on our site and the only plugin that does not seem to work is the "Seo Layered Navigation" by "Ecommerce Team". I have contacted their team, but they do not support 1.13 yet. Everything in the plugin works great, except for the actual ajax calls for filtered results. The "is_ajax" component does not seemed to be picked up for any reason.
site.com/catename/filter/manufacturer/manuwesearchingfor?is_ajax=1 always returns a 404 error.
The observer for ajax is not being executed for some reason. In the config.xml of the plugin we have:
<frontend>
<events>
<controller_action_layout_generate_blocks_after>
<observers>
<setfilterspagetitle>
<type>singleton</type>
<class>ecommerceteam_sln/observer</class>
<method>setPageTitle</method>
</setfilterspagetitle>
</observers>
</controller_action_layout_generate_blocks_after>
<controller_action_layout_render_before_catalog_category_view>
<observers>
<init_ajax_request>
<type>singleton</type>
<class>ecommerceteam_sln/observer</class>
<method>initAjax</method>
</init_ajax_request>
</observers>
</controller_action_layout_render_before_catalog_category_view>
<controller_action_layout_render_before_catalogsearch_result_index>
<observers>
<init_ajax_request>
<type>singleton</type>
<class>ecommerceteam_sln/observer</class>
<method>initAjax</method>
</init_ajax_request>
</observers>
</controller_action_layout_render_before_catalogsearch_result_index>
</events>
I cannot find any documentation on why the change from 1.12 to 1.13 would have removed one of these observers.