Classes stripped

[1stevengrant]

Any reason ex_sponge would be stripping classes on an element?

Tried adding it to the allowed attributes parameter to no avail.

{exp:ex_sponge
    allow_tags="minimal"
    allow_attributes="href|src|height|width|alt|title|name|cite|colspan|class"
}
{article_content}
{/exp:ex_sponge}

Any ideas?

I can't see anything in the regex within the plugin itself and the demo works as expected but not within the plugin.