People were reporting drum map issues with Everett 1 in announcement thread. Here's a placeholder for these issues.
If you are having issues please provide your steps to repro here.
(I've create a new thread for this because if the issues are reproducible this thread will end up in problem reports, hosts will not be able to move the announcements thread, and plus it will be easier to discuss on a dedicated thread).

Doktor Avalanche
(I've create a new thread for this because if the issues are reproducible this thread will end up in problem reports, hosts will not be able to move the announcements thread, and plus it will be easier to discuss on a dedicated thread).

Good thinking  Although drum maps seem to be working here...

I've resolved my drum map issues and RP issues. For the next week I'm on Maschine and then b**gering of to Spain. By the time I get back all should be well ... Anyway back to topic...

Regarding fitzj's post: "The drum map is now staying attached when you save the track Template but in Piano view it not showing the attached drum map. Anyone else have this problem?"
 
If there are any synth or audio tracks included in the PRV track picker, the PRV will default to showing the Notes pane when the project is re-opened, and you have to re-select View > Show Drum Pane.
 
This is not a new issue, but might be what he's encountering.

I think you're right there Dave.
 
Drum  maps are definitely and consistently "sticking" whenever I open my projects - and they also trigger as they should.

9 tracks with ezdrummer synth and ezdrummer map
View > Show Drum Pane.  is not the issue. 
Drum manager can see the the attached map  but no map  is showing once in  PRV
 

When you say there's no map, do you mean you're seeing the Notes pane with the piano keyboard or maybe just note numbers at the left? It's possible to have the drum pane enabled with the divider between the Notes pane and Drum pane pulled up so high that the drum pane is effectively hidden.
 
It might help if you post a screenshot(s) showing the PRV, the output assignment of the MIDI track, and the drum map.
 

Only Piano keyboard. I then click  show Drum Pane and its empty.
 

If you have your controller pane too high up the screen the drum map will still be hidden, even though you've chosen to display it
 
If you hover your mouse in the are indicated by the red rectangle it will turn into a double headed arrow.
 
Now click & drag downwards to reveal the Drum Map
 

I'd like to jump in with a slight sidetrack.  I'm running X3E and the drum maps load OK but when I open a midi clip for editing, the drum map is small at the top and the piano roll view takes up a bunch of the screen.  I keep having to resize the piano roll so it disappears, which is quite annoying.  Am I missing an option somewhere?