Hi Richard,
Congratulation on new version frameblending is very helpful as are fx editor and new play audio modes. I recently started programming a show in version 257 but as the show developed it got really audio heavy so i migrated over to the new version. I noticed that all layers in mixes jumped down by one mix. So for my show i had layers 1 to 8 assigned to mix 3 only , these now were assigned to mix 2 and the same for other mixes moving down by 1, so i don't know if u had allowed for migration between the softwares or if this is a bug but either ways i've flagged it.
Mick