Nooo not a crash! Thanks for the heads-up. I wonder if it's when there are no stacks other than the system; I'll have a play in my VM. It would be great to follow this up in the forums, so thanks for trying and sorry it's caused you troubles! You don't happen to use Hotmail perchance? I've seen some issues with their blocklists. Anyway, feel free to contact me directly at hello at indigostack.app and I will do my best to get things sorted for you.