Just a heads up for those who might be using it... I just had to
uninstall the new version 3 of Comodo Firewall as it was preventing IDEA
from starting up with the standard vmoptions - It caused IDEA to fail
with a "could not reserve heap" message. I changed the firewall
configuration, even stopped it and disabled the service, but it still
prevented IDEA running until I fully uninstalled it, so it must be doing
things at a deeper level.
It's just been released, so if you get the update dialog, think
carefully before installing!