Hmmm...
Now I'm noticing something feeling a little buggy with the synth rack.
If I float it and use ctrl-shift-s to toggle it open and closed, all is well...
...that is, until I re-open the project and find the synth rack has been forced open and docked to the right. If I dbl-click on the header, it returns to the floating settings I left it with but I must do this every time I open the song...
Not fun... Think this needs bug report?