Nspire OS 3.0.1 was not only destroying calculators, which was the main fact reported here.
You might be less interested, but it was also giving wrong mathematical results in some situations, when 2.1.1 and older OSes had no problem.
All reported bugs seemed to have been fixed in the 3.0.2 OS.
But a new situation giving a wrong mathematical result has been found out on TI-Planet by Spirikoi. And of course, as it was not reported before, all 3.X OSes are affected: 3.0.1, 3.0.2 and the newest 3.1.0.
Check it out on TI-Planet:
http://tiplanet.org/forum/viewtopic.php?f=43&t=8268#p116632