Using multi-commander 6.5 build 2282 x64 (w7 x64), I have noticed a couple of things that seem worth mentioning:-
I've noticed that the 
column settings often change widths within my open/saved tab selections & I need to use the 
restore columns right-click function after a system restart or MC restart.
The strange 
selection bug is very rare now but will still occasionally manifest if I have a folder of more than 400 files and complete some operations like 
move delete copy rename etc between selections.
I find the 
move copy function seems to grab focus more than previously. 
E.g. if I set a file to copy to a USB stick I could previously click to return back up the hierarchy of folders and initiate further move/copy operations which then would be queued from different folders. 
If I try that now I find MC will to some extent 'hang', & although it will always recovers it takes time to make the transition between folders & to queuing further commands. 
Previously MC would change dirs & queue as fast as i clicked through them. (I am using a 
no dialog command in a button for the move/copy ops.  Don't know if that may be relevant.)
I notice on the 
Find dialogue that the old setting for 
search within results is no longer present. I'm guessing that it can in most instances be replaced with a Regex, but is there any likelihood that that switch will be returning?
I haven't looked too closely at the script/internal commands relating to the new Find Filters yet. 

   But  I wondered if I could assign a MC command or script a button to use a find preset & then use that as a selection to be assigned to a following operation.
E.g.  Find <filter selection preset> & move selection to opposite pane.
Thanks your continued efforts on this Mathias - always lots of great things in MC!   
