So is this intended to be last testing release prior to 0.90-beta?
Barring any showstopping issues, yes. I plan to have it posted alongside 0.88.1, and if someone has enough RAM, they can still use the old one which may be more reliable for now. But it seems that this version is working quite well for a lot of people, and 0.88.1 is getting more unreliable, so I have to release it sometime!
Version 0.91 will be tons of polishing, bug fixes, unicode fixes, and optimizations. I expect that
that version will edge 0.88.1 on reliability.