I'm not sure how comprehensive Tails' tileset test was. Did he run around every area in the module to see if they all worked? Of course, I'm also not sure what the tileset bugs encompass. That said, if I'm not mistaken, there's already a temporary workaround that fixes the issue.
I hope that I'm not too late for the party here, but what ever became of this CEP 2.6 update, anyway?