Submitted by gpersoon, also found by cmichel
The function setUnderlyingTokenPercent doesnt check that the sum of all the percentages is 100%.
This way the percentages could be accidentally set up the wrong way, with unpredictable results. Note that the function can only be called by  controller or the owner so the likelihood of mistakes is pretty low.
Insurance.sol #L100:
Recommend changing setUnderlyingTokenPercent to set the percentages for all the coins at the same time.
And check that the sum of the percentages is 100%
