The smart group:
Any of the following are true:
Kind is Plain Text
Kind is Rich Text
cannot be created. The last condition is always lost. I e-mailed this to support a week or so ago but no reply.
Yes, that does indeed seem odd.
Here’s a way to accomplish what you’re looking for – but it’s like tying three knots when one would do
That’s a known shortcoming, korm’s solution is the currently suggested workaround.