Hi Barrie (and Tim),
Thanks for the additional insight here! That points the way to a workaround that hopefully will work for a rehearsal file, if not for the "pretty print" version.
Tim, I just tested this and it works. Hopefully it will be a workaround that you can use for practices anyway, although it does lose your Rehearsal marks (ouch - sorry). Open your file and use File/Export as MIDI, and be sure to check the "Write out repeats" option, then you'll get a full-length rehearsal file that will play the proper tempos (yeah, it should be "tempi", but that sounds funny

) at the proper places, even if you stop and restart playback midway through the file.
Thanks for the added insight Barrie - I'm adding this to the "fix it" notes.
ttfn,
Sherry