Sep 24 2015
I'm interested in this bug for the same reasons as Wbm1058 and Jenks24. My guess is that the problem will not be that hard to fix.
Jul 22 2015
From viewing the examples, all I notice is that in the lower limit, "i=1", the terms on the two sides of the equal sign are at different levels. I'm guessing that is the problem seen by fredw with \bigcap and \bigcup.