Ardour 2.8.11 is now available from the usual location:
http://ardour.org/download
It contains only 1 change from 2.8.10, but its an important one:
* Do not prevent transport operations after an export (and
potentially at other times)
All users are strongly recommended to upgrade.
Thanks to Joe Button for outstanding service as user-turned-bug-tester
as he provided help in squashing this bug.
best,
--p