Although this may well be related to #189 ("Mouse cursor is tiny"), this deserves a new ticket.
Other related tickets:
It looks like a race, so please provide steps to help reproduce it and the cursor related output from "xpra info".
It would also be useful to launch a new xterm from the xterm with the misbehaving cursor to see if the new one still has the same problems.
Other useful info:
Never mind, I assumed the code in #189 had been reverted from trunk already because:
Fixed in r3770, feel free to re-open if not.
It looks like the cursor on the initial xterm is still a hair on the large side... or maybe I've been staring at too many xterm cursors and I'm hallucinating.
Since it's not enough of a difference for me to be sure it's not just a hallucination, I'll leave the ticket closed.
this ticket has been moved to: https://github.com/Xpra-org/xpra/issues/369