Hmmmmmmm! So I'm guessing it's the old css classes on the theme style sheet that are referencing a class which has been removed in the new version of the filter plugin.
If only it were so straightforward.I'm thinking now, at the theme developer, their will have been an element or 2 changed since March and if the plugin developer changed 1 thing in the plugin, that would've messed up something else on the theme.
Would be worth emailing them to ask for the most recent changes to the theme or at least see whether they were aware of a change to that particular plugin too.
