My markers also disappear without reason, and I also get the strange symbols that angelonyc reported. Unfortunately, unlike what enjolis reported, my markers never come back once they're gone.
But... great workaround Doug, I'll have to remember that. Goes without saying, though that I wish it weren't necessary to resort to a workaround.
FWIW, marker text has been flaky since Logic 7. Apparently it's not enough of a priority to fix, o/w, two revs later it wouldn't still exhibit this behavior. Either that, or, like the undo history recall (at least as far as 9.0.0 is concerned) it's "unfixable". Who knows...
Message was edited by: iSchwartz