In the previous version of Flash I had a custom command with the shortcut Ctrl+S assigned to it. The new version seems to have its own Ctrl+S assignment.
When I load Flash, connect to a site, and press Ctrl+S, I am greated with the inbuilt Mask Select dialog.
If I close that dialog, then manually selecy my own custom command, via Commands -> myCommand, which brings up my own custom dialog, then close this dialog, press Ctrl+S, I am now greated with my own custom command.
Close Flash, reload, back to square one.
I also just noticed that if I am at the point of Ctrl+S using my own command, if I change directories on the site, Ctrl+S defaults back to the File Mask inbuild dialog.
Hope this makes sense.
ash.