Tora Mission bug (No 1407189674)

Quest is instant fail - before the dialogue has even completed. I don't know how to post a screen shot, so the relevant text is:
[STRING FORMAT ERROR: boost_too_few_args. format string referred to more arguments than were passed. ORIGINAL TEXT: Hunt down the infected beasts. (%1%/%2%)]
Mission failed. Not enough corrupted corpses are left.

It was the same message as this guy got from vagan: http://www.pathofexile.com/forum/view-thread/1009716

I did my Zana mission today, Mission objective was Kill the Rogue Exile, But Tora was in my map instead with this error, Took a screen shot, Once I killed the infected mission was completed, but no rogue exile.



Regards,
Ruber

The Master missions are all screwy after the most recent patch.